Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a97c363f5faf46…

MALICIOUS

PDF

71.7 KB Created: 2020-07-31 20:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 170668fb85379fcfb06ba8001a79e001 SHA-1: 77a8524b14651e34a6e527a712476e0ac9cd5011 SHA-256: 16a97c363f5faf462e6f18fd6d8afbf172a58633145fa8aeefa94cb80becf91f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, with a high ML classifier score. The embedded document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware delivery.

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.com/pify?keyword=tom+petty+discography In PDF document text
    • http://files.dbfightfire.com/uploads/1/3/1/4/131409200/woremebo.pdfIn PDF document text
    • http://files.ashleighhaddad.com/uploads/1/3/0/7/130739385/tuxigitas_dusiwexugolodes.pdfIn PDF document text
    • http://files.graceanddiggs.com/uploads/1/3/1/0/131070799/9817102.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/1/0428/9835/8432/files/rirolor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65022979336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6595/6760/files/kedazosarodorivuperedem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/xubotupugupolajipenaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/94378520604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/panaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/80741334552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/xiguxejejap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/viliwoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.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 3

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_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 5508 bytes
SHA-256: a2786cab8168afec27b5216841955ceebae3dfe9e06514f40a004a7f9f8d29e2
font_01_sfnt_off0000ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 10900 bytes
SHA-256: c689171836148a7b123f4f9b4dc5166a38ae590f318c83a841ee666579d16a4b

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