Malicious PDF — malware analysis report

Static analysis result for SHA-256 c319b89615b1a0af…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 09:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c25c3af4c22b5ceb2f3b83fe5b64b772 SHA-1: b286b5f5bb1affe39183a9491aff146d2f04b3da SHA-256: c319b89615b1a0af1a91f3c0e7dc0559cd409fd2ac87b647d12da33ba1cef708
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO poisoning tactic. One of the primary links redirects to a known malicious URL, indicating a phishing or malware distribution attempt. The document body text, though partially corrupted, contains keywords related to downloading technical PDFs, reinforcing the lure.

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=aircraft+design+a+systems+engineering+approach+pdf+free+download In PDF document text
    • http://vaxan.ammsband.org/uploads/1/3/1/1/131164250/kakewuzajodujuvinozu.pdfIn PDF document text
    • http://pawiveg.millertravelcompany.com/uploads/1/3/1/0/131070420/zipune-wepinijajudow.pdfIn PDF document text
    • http://files.angelhawariart.com/uploads/1/3/2/6/132683140/9833388.pdfIn PDF document text
    • http://files.monikamdesign.net/uploads/1/3/0/9/130969254/4f9c30bd29.pdfIn PDF document text
    • http://piriwasip.grantdesignsdancewear.com/uploads/1/3/1/4/131438641/248355c7c.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/1/0436/9183/5547/files/sajisajiburemovewisas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/rumifejudivutapoduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/nikon_sb_600_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/vorefiberizedus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1017/0786/files/13072230782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/39917317574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/40436498322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/furarabuvisesubuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56070096689.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_off00005aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAA 5752 bytes
SHA-256: 1ef2ced9a7370ff8cd06318d2bd0098164b6af504bbb5375b1255fce41589c42
font_01_sfnt_off00006e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E15 10176 bytes
SHA-256: fd142dd5ac24bee42d886959788f3863defa8970b244d9ceb175fcae1c366f18

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