Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da139870d33e8b6…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 23:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 483f5f7c1d1457f893219200a899426b SHA-1: d5860c7452df392757c698c87a207f94b2647750 SHA-256: 7da139870d33e8b63a4e13216ff7a831e18a71da8d9fd9c512009d8e383e9f62
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, also contains this malicious URL, suggesting an attempt to drive traffic to a potentially malicious site or phishing page. The ML classifier strongly indicates maliciousness, and the presence of a link farm heuristic further supports the malicious intent.

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=nucleophilic+and+electrophilic+substitution+reaction+pdf In PDF document text
    • http://files.legacycockapoos.com/uploads/1/3/1/3/131379057/lopevaxameket_vurika_japofebuj_fejad.pdfIn PDF document text
    • http://files.the-learning-agency-lab.com/uploads/1/3/1/1/131163943/rofin.pdfIn PDF document text
    • http://files.ghoddousi.com/uploads/1/3/1/3/131379820/1424354.pdfIn PDF document text
    • http://files.milwaukeecharteradvocates.org/uploads/1/3/1/4/131452840/fekobagedetip-rujegajobe-tibuz-zubonafanewuwi.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/1/0428/5313/8591/files/godokalebalexivus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3105/0905/files/gentleman_s_dignity_eng_sub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/rufepuxekelunexajamagedan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6023/files/tajiruxafadapebaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/kohler_a112._18._1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/josunexod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1647/8110/files/print_webpage_to_without_ads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/78947696854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/cauchy_schwarz_inequality_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/bournemouth_town_centre_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/pobejapimitowux.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_off00007090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7090 5352 bytes
SHA-256: 62d3315bf34a1ddf8d4961a63414658b4792dd62a86c3ba3f29aa7ce1810a3a6
font_01_sfnt_off000082ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AD 10392 bytes
SHA-256: bd4bec392de5bbc0977cd4340d79ddfdb4553440f0fa02a5b35a02eea45b42c7

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