Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7ac2e89e161606…

MALICIOUS

PDF

42.3 KB Created: 2020-08-03 16:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c5af1130278461bee4b4016d68c05af9 SHA-1: 3902df5b9beb6f8a434208dd6073d8850d8832c3 SHA-256: 7a7ac2e89e161606165f89c924930d15b9a4d6fbca0279c4249bb5f216273119
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is associated with known malicious infrastructure, suggesting an attempt to lead users to a malicious site under the guise of offering free books. 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.ru/pify?keyword=anthropology+optional+upsc+books+pdf In PDF document text
    • http://files.6thstagnesscoutinggroup.com/uploads/1/3/0/9/130969659/38d6b527.pdfIn PDF document text
    • http://files.2wolvesinc.com/uploads/1/3/1/3/131383760/tataza.pdfIn PDF document text
    • http://files.xtabentum.com/uploads/1/3/1/0/131070204/546590.pdfIn PDF document text
    • http://files.100womenwhocarenorthsuburbanchicago.com/uploads/1/3/1/1/131164185/9517547.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/1/0432/7453/5067/files/eq2_crypt_of_betrayal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/19762507803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/29952515010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/lolin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/95693050835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/7353003231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/54417293838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/52776845926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/kiruxovufizajepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/lamoganitav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8736/2216/files/59210079095.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_off00006695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6695 5712 bytes
SHA-256: ac3fa7f431c8fdbb0300bb4ec996f21a73054ccf3a28ffa1c8b0af4f772da40f
font_01_sfnt_off00007a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0D 10004 bytes
SHA-256: 8cca76e76a8909755987c664072963629e04d6ee0adf280238b9993dd9c1dcba

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