Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cee448d94b9c2dd…

MALICIOUS

PDF

45.5 KB Created: 2020-08-06 20:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5efef63aff4dac3c65ce621102105494 SHA-1: 64fcb774ca111e83994dd40cc9a91afda53082e0 SHA-256: 0cee448d94b9c2dddfb885faebdb4d3f7cdac67f1e3d95a4b410190c40e54a7a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) disguised as a document download. This SEO link farm tactic is designed to lure users to potentially malicious sites. The ML classifier strongly indicated maliciousness, and the presence of redirector links supports a phishing or malware distribution attack pattern.

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=laboratory+manual+for+pulse+width+modulated+dc+dc+power+converters+pdf In PDF document text
    • http://files.brandongarveyart.com/uploads/1/3/1/4/131437573/4665709.pdfIn PDF document text
    • http://files.shortalesgsp.com/uploads/1/3/0/7/130775516/biluforuwozemawe.pdfIn PDF document text
    • http://files.gcproviders.com/uploads/1/3/0/7/130776150/7412181.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/1/0432/4635/4592/files/gexaxizipojetigizuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/vopezukuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/mexugofamawirufowuzag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/zuxon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/53342998502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/12633092135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/76057171958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/36410798400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/attack_on_titan_episode_25_english_dubbed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/rexumenixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/gedamamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3555/files/liwifuwupatezamakaw.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_off00006f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F94 5732 bytes
SHA-256: 216860e0ba065e38b66ddc2a566737e3fc4212b614f059a98f86193b4b27b36f
font_01_sfnt_off00008303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8303 10536 bytes
SHA-256: 09302b86c9237cd46c90eb7d754fa6c6c052f6179d6c6cd554fff2614e3e2244

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