Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4c9d4eeeda5f48…

MALICIOUS

PDF

48.7 KB Created: 2020-08-18 16:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6be62fd8c29fc14da138e668a6f9459 SHA-1: 2c3cb08028b515c76939f3e84d8b318e4ba42d54 SHA-256: cb4c9d4eeeda5f48a3c00d256b928b07b1e7734608dd0835165bd2f42dc6692d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, which is flagged as malicious. This redirector is part of a link farm designed to host numerous PDF files, likely for SEO-based phishing or malware distribution. The document body, though heavily obfuscated, contains the same redirector URL and a benign Shopify URL, suggesting a lure for users to download potentially 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.com/pify?keyword=steelseries+arctis+7+driver In PDF document text
    • http://files.fortheloveofriding.com/uploads/1/3/0/7/130775565/xikibexikekolal.pdfIn PDF document text
    • http://files.prettybakedqueens.com/uploads/1/3/2/6/132681464/tebudikuru.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/1/0427/6148/6503/files/47423217843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/xerirazabulikotos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5628/3296/files/68762499161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/richard_mcelreath_statistical_rethinking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4428/1247/files/40296820964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/sutixixamegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6810/2558/files/android_video_player_stream_chromecast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/nice_guidelines_head_injury_clopidogrel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71482320097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8673/3727/files/peter_f_drucker_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/assistant_sales_manager_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/4756549705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8458/5883/files/ripapabatobamir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/mathematics_all_formula_list.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 5176 bytes
SHA-256: d63e545102b32c4ecf6c905190be6d2f9ce2da399a36e6c772fd834e2f05111f
font_01_sfnt_off000088c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C3 2132 bytes
SHA-256: e7b0a174ab4f5c5fda3c01b701415be6dfc05397f7dae02d2d72f9d28d4be8c0
font_02_sfnt_off00009226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 10192 bytes
SHA-256: 696eb1411190ba0bc9997242434ea22a0875afbd014ed7306b1e3ee4a95d6ed4

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