Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f9a5652ec4d342…

MALICIOUS

PDF

36.1 KB Created: 2020-08-06 01:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 668965d0f3862762755215c5ac0df07c SHA-1: 3362d0c78a971f76ce9254fe40fbdc470be5cd0e SHA-256: 55f9a5652ec4d34286bc7b30e0246ec2d32af0223f820a089eb228b47206be95
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the text 'Reading vocabulary development 3 cause and effect pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links further indicates a link farm used for SEO poisoning or traffic generation to malicious sites.

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=reading+vocabulary+development+3+cause+and+effect+pdf In PDF document text
    • http://files.susanaramirez.net/uploads/1/3/1/4/131407424/jikutirobogov.pdfIn PDF document text
    • http://files.toadstudioonline.com/uploads/1/3/0/8/130874123/cbc39ff53d.pdfIn PDF document text
    • http://kunizupur.gtectrain.com/uploads/1/3/0/7/130739457/4bd9dd2649acda8.pdfIn PDF document text
    • http://files.rosemarygallagher.com/uploads/1/3/0/8/130813373/2cd2a741464.pdfIn PDF document text
    • http://gemawab.tracy-buchanan.com/uploads/1/3/2/6/132683014/9073841.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/1/0429/8250/6647/files/93902843979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/43266173385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/88450071831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/6._snf_sosyal_bilgiler_testi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/gauge_girl_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/primary_medical_certificate_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/26406551005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/80724734423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1935/4791/files/berean_study_bible_old_testament.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/86434716037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/junakolabepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/wenavumorudukujipe.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
🗂 Part of campaign: echeloncatapult.org 5 samples

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_off00004be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE7 5948 bytes
SHA-256: 7767cb5978272097cd836cec5e7dcf92d83949debd50974f6583f5be341b78d8
font_01_sfnt_off00006025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 10264 bytes
SHA-256: 344dadef27f7d91bf6504700482724761b7423c152878f1e7dedf9e06d7f8d91

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