Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc7061598f48b01…

MALICIOUS

PDF

54.5 KB Created: 2020-07-31 05:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2270090dc907c7cda8dc63417d5b7c1 SHA-1: 8b17a6a083bf55c0df653a98fbe2cd6ab7553d08 SHA-256: bfc7061598f48b0128b5f21603ed8c28af13af8d82f1fc5d72b6b451276c9623
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'probability aptitude questions and answers pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=probability+aptitude+questions+and+answers+pdf In PDF document text
    • http://files.gatewayoflight.com/uploads/1/3/0/7/130739542/verakarexa_nagojubiro_pimivoso.pdfIn PDF document text
    • http://files.seaspiritstudios.com/uploads/1/3/1/0/131071082/442ed4344e3ba.pdfIn PDF document text
    • http://files.jaymelea.com/uploads/1/3/1/4/131437984/4314514.pdfIn PDF document text
    • http://files.soulsearcherskernow.com/uploads/1/3/1/0/131070912/6157150.pdfIn PDF document text
    • http://files.alterationstotnes.com/uploads/1/3/1/8/131856285/palozesujeluram_tadezewup.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/1/0429/4826/4089/files/zinajoresiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3579/5354/files/bulinebefawadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/jexotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/moxopukivar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/zezubobekofexomekabazus.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/1/0435/1868/9434/files/sozoxureki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/turisupapotafezugozuwiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/57299245406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/kuvub.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F36 5380 bytes
SHA-256: 7700f55302848dcf142bca22c24e8c16daad476b83e2d99b2489d8de847977e6
font_01_sfnt_off00009192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9192 11064 bytes
SHA-256: c1ce0909915a191da2f009c6e7bf8bc1758d1f2c3caf4e8426bea28080d4444b
font_02_sfnt_off0000b79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB79B 16088 bytes
SHA-256: ccd0ea095085b9379100d4de0d13d045157d8501f46cd3db2ef5c00475687e02

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