Malicious PDF — malware analysis report

Static analysis result for SHA-256 772f0ca63a9c79c6…

MALICIOUS

PDF

40.8 KB Created: 2020-07-30 03:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b21d523a410c7940ad8bbb3848a2a8cf SHA-1: cab5852dede2869b94af323f14fb78be84eca123 SHA-256: 772f0ca63a9c79c63b88888a7da3afaf18248ac215926379925d4346c95d0725
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the text 'Amino acid quiz pdf', which is likely used as a lure. The embedded URLs point to redirector services that likely lead to further malicious content.

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.cc/pify?keyword=amino+acid+quiz+pdf In PDF document text
    • http://files.pcaspiritwear.com/uploads/1/3/1/3/131380850/zofadatudaso.pdfIn PDF document text
    • http://files.witchshopmiami.com/uploads/1/3/0/7/130739758/liseserukukomo.pdfIn PDF document text
    • http://files.pollination-project.org/uploads/1/3/0/7/130776877/66a74dcab517e8.pdfIn PDF document text
    • http://files.saintstanislaus.com/uploads/1/3/1/1/131164063/5645926.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/1/0431/2514/5760/files/vawovimukojagulav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5926/5188/files/lobakademonewesuwudel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/jenomekagalebes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/25673162420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/tagoruvobez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/vojulerides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/dizavote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/56233793502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/varedenarafipikinotimobuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/bidoradadeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/69424312758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3913/7702/files/borez.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 5

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_off000061ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 4844 bytes
SHA-256: db7ba092687ebf7f8e5af817f2445310783e3ac3d2699dbe83a41fc43b8d17ae
font_01_sfnt_off00007202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7202 10672 bytes
SHA-256: d087ff653cb9a61eeefbaf1d02dffac1ea374c0110b7dff38e76fbaa90f77f95

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