Malicious PDF — malware analysis report

Static analysis result for SHA-256 37951fcceb3add65…

MALICIOUS

PDF

32.0 KB Created: 2020-08-05 16:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fb457e17defb0af24584a3b117b6526 SHA-1: 90448ff24a5a98c17096582c5a3b65145c8d537e SHA-256: 37951fcceb3add656c677bf4a0d514ecedf43fbace411d05d679a6a4994f0549
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains text that appears to be metadata rather than user-facing content, and the embedded links likely serve to redirect users to malicious sites or download further payloads. The primary malicious IOC is the redirector URL.

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=speak+now+1+pdf In PDF document text
    • http://files.asd2forms.com/uploads/1/3/0/9/130969083/5055819.pdfIn PDF document text
    • http://files.takeabreakfromtheinterstate.org/uploads/1/3/2/3/132303353/rafudiwuxokelod.pdfIn PDF document text
    • http://files.ageniart.com.au/uploads/1/3/1/3/131398338/6827641.pdfIn PDF document text
    • http://files.alanbazin.com/uploads/1/3/0/8/130813111/8112702.pdfIn PDF document text
    • http://files.weansweredthecallfilm.com/uploads/1/3/1/4/131452806/dexewavuwupa.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/1/0434/1320/9246/files/ps3_emulator_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/wasojibaderotodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/97883453971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/39614084541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/64311041827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/5843942040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/zokanajizof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/walupomozimorizazutomar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6738/2687/files/15934062639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/37639555748.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_off000043b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43B6 5040 bytes
SHA-256: 321b75dafaa95856181c03621b4a3a1a7e91f77c67a4e8b25876353f686ad090
font_01_sfnt_off00005513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5513 8820 bytes
SHA-256: 117b1be24e0293b935190ca09d874d0d4461c25a91a18e3c240cedd08cc00e8f

Open this report in the interactive analyzer, or submit your own file for analysis.