Malicious PDF — malware analysis report

Static analysis result for SHA-256 741559a842557090…

MALICIOUS

PDF

35.4 KB Created: 2020-09-10 02:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b987e6a86323e60b8a918feda41c7932 SHA-1: daf9f364a741b385bc578b887420853b5bc1d6a9 SHA-256: 741559a842557090a7d471ce1a00ece067930c82fb32da8b0cadef54b1fb0ff8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to redirector infrastructure, with one prominent URL being https://ttraff.club/pify?keyword=recognising+tenths+and+hundredths+worksheets. This suggests a phishing or scam attempt, likely to deliver a second-stage payload or lead the user to a malicious website. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.club/pify?keyword=recognising+tenths+and+hundredths+worksheets In PDF document text
    • http://fugoj.reading-is-lit.com/uploads/1/3/1/4/131452954/fuzawirebuj-xuvuti-mosomemeneliv.pdfIn PDF document text
    • http://files.chrysalisearthfarm.org/uploads/1/3/2/6/132681660/vutofela.pdfIn PDF document text
    • http://files.my-elliott.com/uploads/1/3/1/3/131380511/turivuxumumu-rubekasez.pdfIn PDF document text
    • http://watug.leilanisalon.com/uploads/1/3/0/7/130738801/7317663.pdfIn PDF document text
    • http://files.theredladybugdesign.com/uploads/1/3/0/7/130740249/1108477.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/1/0435/1351/2100/files/toyota_auris_2020_brochure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4272/6310/files/tft_item_builds_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/28556687231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/nalul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/arpegios_para_guitarra_clasica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/central_pneumatic_3_gallon_air_compressor_manual.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e1a791_f7df3d9619274e0d957310cf61b727f6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4ae4db_be326516a19b4fcfa39c0756d8f5847c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3eb4bd_e2c5d1de5f0446f988f4ecda36ac7599.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7B 5332 bytes
SHA-256: 660ce1e2be43313ef76472a9fbe063b0d2345e3082e85e7c1bb00caad1658609
font_01_sfnt_off00005eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAE 9960 bytes
SHA-256: 048ca025d23ef0967d00e1db3556d466730339d46f9be66855b172ddfd365523

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