Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8a3d2f2f0850e1…

MALICIOUS

PDF

38.9 KB Created: 2020-08-09 00:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9c7e5d3b58bd4cfb2119a5ae17591aa SHA-1: 7bf81205fdceb5b6389c92dba3d07c51cb686026 SHA-256: ea8a3d2f2f0850e132ce2a1786f41dcc2f4e408998cfda32f4075f9374bd391f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=acca+f5+bpp+exam+kit+pdf. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=acca+f5+bpp+exam+kit+pdf In PDF document text
    • http://files.lauraschultzyoga.com/uploads/1/3/2/8/132814473/323615.pdfIn PDF document text
    • http://fiver.glowfishstudios.com/uploads/1/3/1/4/131453133/a4f3fb.pdfIn PDF document text
    • http://kotos.lindsaymc.com/uploads/1/3/2/7/132740435/ziparaf_rufapoxumezaxu.pdfIn PDF document text
    • http://pokebiba.hikingforthescaredycat.com/uploads/1/3/0/7/130775162/cd6026.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/1/0432/7433/8454/files/samazidezowumurakez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3810/3962/files/adobe_acrobat_x_pro_edit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/principle_of_cavity_preparation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7630/2486/files/rent_stabilized_lease_nyc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/90987909936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5175/1336/files/12866409122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/balagiwipisoluxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1461/files/iso_certification_process_steps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/31139547376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/36485652751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/sample_email_for_sending_resume.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 3

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_off00005972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5972 5380 bytes
SHA-256: 4d4abbe8c8198a176e88a3851197192fabde596fdfd7b89cecd74ea973dbacdf
font_01_sfnt_off00006bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBF 10424 bytes
SHA-256: c0b38ae18606f13c47c018b9b401d8dd34a7671b36f29610809cdcbcbb96eb0e

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