Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbfef502536a4be…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 12:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae9578c5ca449c19a8faa8b6ca7f151b SHA-1: 66e248c56f098eed2b1f37d552f29985d75994b7 SHA-256: cdbfef502536a4be15626aab87afcfe8366bd378d49ad77f1e74690e5b1a4546
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness. The document body contains garbled text alongside URLs, suggesting an attempt to obscure the malicious intent or to manipulate search engine results.

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=your+lie+in+april+live+wallpaper+android In PDF document text
    • http://files.simplelivingkc.com/uploads/1/3/0/8/130874520/e439217b.pdfIn PDF document text
    • http://files.northernumpires.com/uploads/1/3/0/7/130775727/81fc007397e04.pdfIn PDF document text
    • http://files.cannycanines.com/uploads/1/3/0/8/130874369/rixirudajisise_jerufo_sotedejof.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/1/0429/1585/6550/files/vasikibuwodibelij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/bujupomava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/40112894851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/25983081202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/xavelogibozisaxozub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/pulafajezujexubaxila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5992/7448/files/98346934646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/gabivaworevopojin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/to_autumn_poem_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/73499447308.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 6

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_off000072c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 4888 bytes
SHA-256: 63b3a2f5ef61821b89a60dfc729cf25e73b8055516060dc79a2b29704a4e1fa5
font_01_sfnt_off00008386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8386 10016 bytes
SHA-256: 3143e8dcd233f9aa8dddaf36712cfcb317ec40edf9f4022a0de875bb8122e77f

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