Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fb523cea94db05…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 23:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7cae7861760d3858b63f0bb850c0e428 SHA-1: f23e423c66d9fb6183375610945791865fa313cf SHA-256: b7fb523cea94db0505b6c92d61f19ee9e8ec461329b22b72ba8e6fa341326138
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.com/pify?keyword=calf+stretches+pdf', indicating a lure to a malicious site. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute 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=calf+stretches+pdf In PDF document text
    • http://files.registrationdogpapers.com/uploads/1/3/0/7/130776503/11df2323.pdfIn PDF document text
    • http://kabovut.buttonapparel.com/uploads/1/3/0/7/130775320/1bdf4.pdfIn PDF document text
    • http://bewev.lastoutleatherco.com/uploads/1/3/1/8/131856333/dexawodapawamosim.pdfIn PDF document text
    • http://kudopogar.happycapehostel.com/uploads/1/3/1/3/131398091/norapi_tazebudofur.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/1/0433/1828/0357/files/xupiwimirifufanupim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/70089501158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7678/8134/files/aadhaar_card_password_cracker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/52979317298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2279/files/infosys_aptitude_questions_and_answers_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/23012186766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4206/9918/files/32190279614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/types_of_communication_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/22521228258.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 2

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_off00006b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 5148 bytes
SHA-256: 82e6d91516b933bb7bd8671c52941a26dc5c25023111b950728a53e8501af0a7
font_01_sfnt_off00007cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB1 9980 bytes
SHA-256: 8af4117987e22be9fbc8dff0593dc04238f7ed0734f11aa8513256f2e48f8549

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