Malicious PDF — malware analysis report

Static analysis result for SHA-256 f307b33daa424040…

MALICIOUS

PDF

43.0 KB Created: 2020-08-04 19:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 261b07214e2ba7b208fa5dcf96321243 SHA-1: 3e41a511d377012f963b9eeeb54c5c057c8c416b SHA-256: f307b33daa42404041cd90475342c2a73c6187a69c0ab6d04db5d93610e97fe9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to lure users to malicious content. The primary attack pattern involves redirecting users to external sites, potentially 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.ru/pify?keyword=anthonomus+eugenii+cano+pdf In PDF document text
    • http://files.californiaweldinginstitute.org/uploads/1/3/0/8/130873876/2cf3c6.pdfIn PDF document text
    • http://files.swiss-german-online.com/uploads/1/3/0/8/130874489/75ff69bc.pdfIn PDF document text
    • http://files.innovativeel.com/uploads/1/3/0/7/130776887/zevulasesekup_bakawusir_netilurarunan.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/1/0430/5757/8138/files/bumugafed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/ribefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2532/4439/files/m_119_howitzer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/rulanogegan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/83946999309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/gawepibawemeget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/avancemos_2_textbook_unidad_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5108/1118/files/ravowifuvuwixoponagejox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/ludimiruxos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5232/5272/files/73284038197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/11171613215.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 5

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_off00006ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC2 5428 bytes
SHA-256: 75afa315f1ff2c4b49debe8f8f8facd0317091c8e0cc845fcdbe0b5e7477893b
font_01_sfnt_off00007d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D20 10088 bytes
SHA-256: 5ec7b4b63574637dbf68f7f2fec81d723da4f77daa45b4ed4be1f75dd1ec0969

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