Malicious PDF — malware analysis report

Static analysis result for SHA-256 d386d729032879fd…

MALICIOUS

PDF

39.6 KB Created: 2020-07-23 19:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 186976e8075d3cf1ff7c5148813ef706 SHA-1: f00d920934c2659193d402b81e16ba2d7cd77b67 SHA-256: d386d729032879fd2d222337d253c754d16d032b959c31e79cf700c5356668b6
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. The heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, and PDF_MALICIOUS_REDIRECTOR_LINK specifically calls out a link to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious activity.

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=alison+movie+parents+guide In PDF document text
    • http://files.qualitynow.net/uploads/1/3/0/8/130873728/702750.pdfIn PDF document text
    • http://files.earthspiritpress.com/uploads/1/3/1/8/131858592/dovital-xowajivaf-rugujesijodux.pdfIn PDF document text
    • http://files.troop3mbts.com/uploads/1/3/0/9/130969731/tilapujedasimuvuxud.pdfIn PDF document text
    • http://files.libertymerchandise.org/uploads/1/3/1/8/131856352/kubik.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/1/0430/4021/1097/files/luvimutugifoboxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/77675381069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/naxozinefunufotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/39779171108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/65431142220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/bifaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/tadesajodob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/subowov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/39110473272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/raxamikazewisipor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/51945423478.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 8

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_off00005ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF5 5212 bytes
SHA-256: acaa499c7aeec4bbdf461ed847e2eb06d227f0862d555cb6a00abb89a9363e48
font_01_sfnt_off00007091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7091 9616 bytes
SHA-256: 52fea30cd84cce1b33b86d4f0eeb6e906f305a6800656f36dc3cd0436d55abe0

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