Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f93b4fbe4c2347…

MALICIOUS

PDF

85.0 KB Created: 2020-07-30 23:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a578066f6fad2df7023e3727e737d5d6 SHA-1: 56fa62742b45ea47a2c3d6891164a12feb114ebf SHA-256: 23f93b4fbe4c23477ac977258f939a464df9626258c7857303ab7971ec004e89
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a significant number of embedded links, many pointing to Shopify domains, forming a link farm. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, suggests a lure related to a 'React JS tutorial for beginners PDF'. The combination of a link farm and a malicious redirector points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=react+js+tutorial+for+beginners+pdf In PDF document text
    • http://files.findtheyeti.com/uploads/1/3/1/4/131410545/tofosu.pdfIn PDF document text
    • http://files.aletalederwasch.com.au/uploads/1/3/1/4/131408546/5638055.pdfIn PDF document text
    • http://files.apsh.org/uploads/1/3/1/1/131164067/lolawizixati_tulilusasupagu_goxesuxaze_kajebatonijani.pdfIn PDF document text
    • http://files.technotronics.shop/uploads/1/3/1/8/131871864/3ea7e8413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0981/8272/files/xuwudilopinivuwofem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/rubivewopedufuzepolat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/77148917611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/35342217605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/modalobajisabaran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/65714529872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/ruzigubipaduzizovejunisib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/favitobibababepeselisuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/72157663611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/madovavewozabemaguwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/83039219582.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05D 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 5428 bytes
SHA-256: 569b9a3700e11e7150c6c39fdbbb16fdfd92b6c03a6f9d94ef974efa5e4f53b5
font_02_sfnt_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 3896 bytes
SHA-256: 48affe70d01c3cf01f14fa6b9d38d33f2d007eba034b4d2820ebd0eb916f5c01
font_03_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 13860 bytes
SHA-256: 1d32cbeb47fbb18326f62885cb1491389aa7306de66cc3fbdf1ea9ac1bff3283
font_04_sfnt_off00012f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F93 16352 bytes
SHA-256: a235935b7da1a3e0dfb4386fa22d70075346861adeac55da3f8f322ddd140fe5

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