Malicious PDF — malware analysis report

Static analysis result for SHA-256 c930208c2162d968…

MALICIOUS

PDF

41.3 KB Created: 2020-08-03 16:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a922cdb1dacda1f8eecb2528f1f54337 SHA-1: a940a875fc8ff3c32986515c299a2ca110f968eb SHA-256: c930208c2162d96807889b4156aa88254a9e23c8575215bf5fec27e497ede517
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate research documents, but the primary link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that is flagged as a malicious redirector. This suggests the PDF is a lure to drive traffic to malicious sites, likely for further exploitation or phishing.

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=thyroid+dysfunction+in+pregnancy+pdf In PDF document text
    • http://files.ncexchangeclub.com/uploads/1/3/1/1/131164046/c2917.pdfIn PDF document text
    • http://files.merrittathletics.com/uploads/1/3/1/1/131164440/7795015.pdfIn PDF document text
    • http://files.executive-advocate.com/uploads/1/3/1/3/131379406/kowisi_gulatapagupitol_pifuzunefowoz_fagamiz.pdfIn PDF document text
    • http://files.stfoafrisco.org/uploads/1/3/0/7/130739713/2616085.pdfIn PDF document text
    • http://files.hoaks4wheeldrive.com/uploads/1/3/0/7/130740056/pavirise-kazafor-zogogodivun-jetugipibofutev.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/1/0429/2860/3295/files/febowakumanaseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2151/6449/files/48141117687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/64849674400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5787/2038/files/20366445563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8537/9237/files/vizasodidevatolodufeveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/85014159865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/viropixujarizibukeguvujub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/satovosegivijefesinuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/89818252018.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_off00006251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 5436 bytes
SHA-256: cb9f3a9579cfe5d2a254ecf6036472b0822e807ac9cc62804dc3f254f14f95ea
font_01_sfnt_off000074d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D3 10396 bytes
SHA-256: 47d5bd1fd909996d9594f5c75e7c85c8f370e3bcb32e0e3070bcc5c95df26a14

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