Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f94d964a9064114…

MALICIOUS

PDF

46.8 KB Created: 2020-08-08 12:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cbb570e9050d547d5ef2ae58dc6af870 SHA-1: b19527c6796488d0ae2164b4f5503c959b4c2ddf SHA-256: 7f94d964a9064114cdcd632681357ea2abae94e3019e4e387420273897703f6a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, with a primary redirector identified as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for free content, consistent with SEO link farm tactics. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=orchestral%20excerpts%20for%20flute%20pdf In PDF document text
    • http://files.mackeiganmarketing.com/uploads/1/3/1/4/131452732/sodopafesub.pdfIn PDF document text
    • http://files.fathomworx.com/uploads/1/3/0/9/130969652/fuzixusuf.pdfIn PDF document text
    • http://nugox.callbuddys.com/uploads/1/3/2/6/132696030/vonekovite-vizasuwojok-juwevixukaru.pdfIn PDF document text
    • http://roniluvur.fortywinksbakery.com/uploads/1/3/0/9/130968921/3c998ebf418.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/1/0431/8255/5297/files/back_to_school_activities_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/84885240042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/bikib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/acca_f8_course_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/jagola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/wejozimugipawojokuziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/wazogusabinosiweninaf.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_off00006ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD2 5340 bytes
SHA-256: a1540f244444a2e392b7d8f0068585776b375ef791651fa6590e0fa390fb22da
font_01_sfnt_off00007cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 15308 bytes
SHA-256: bf16eb3f834b2df5b1889ecf2386a8dab8dc3e1087314b287fc7b8aa2b19f525

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