Malicious PDF — malware analysis report

Static analysis result for SHA-256 a763743dff700464…

MALICIOUS

PDF

59.4 KB Created: 2020-08-07 22:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 317295bb85756c75adc8b735da4d16d6 SHA-1: d32a58bd3af3442367f293d1aeac885984a1ed9f SHA-256: a763743dff700464b725430b7b2e608fe080edb706e492cef9ef3a5110a3b50d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body itself is largely obfuscated but contains the malicious redirector URL, suggesting the primary purpose is to lure users to malicious sites. No scripts were extracted from this sample.

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.ru/pify?keyword=reliability+centered+maintenance+implementation+made+simple+pdf In PDF document text
    • http://files.thelearningtreestudio.com/uploads/1/3/1/6/131606494/tirojalupefulup_xozul_sazufexix_navuganof.pdfIn PDF document text
    • http://files.gethsemanebaldwin.org/uploads/1/3/2/6/132681513/7180267.pdfIn PDF document text
    • http://files.wyandotseniors.com/uploads/1/3/1/4/131437242/2337674.pdfIn PDF document text
    • http://tozirut.outonalimbdance.com/uploads/1/3/1/6/131636725/2645019.pdfIn PDF document text
    • http://files.dobetterwhatyoudobest.com/uploads/1/3/0/9/130969999/405647.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/1/0438/8447/8632/files/caetano_galindo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/94281021654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/tiduxalogokiladoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/92112531282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/30342437997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/zedurajigewojipunumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/zijirepulukozavogil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1676/files/52199138275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4330/7175/files/application_of_functional_programming_languages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/72388693791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3600/6817/files/22129997385.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 7

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_off0000a9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B3 5548 bytes
SHA-256: 99d93d04a2b5e3193081eb64ace4cd68cd6d100df4369d35745d52df7d3e1878
font_01_sfnt_off0000bc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC83 10324 bytes
SHA-256: 4f66ba595f7774dd7e4730faaf12d4eb6ec7347161b7b0d334484ba5602f9616

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