Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57ba707566214f7…

MALICIOUS

PDF

45.6 KB Created: 2020-09-17 02:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 778293455e4422b2a34a12351d5ba0fb SHA-1: 927fbfcbc266637a134bd5985ab0981883034b1f SHA-256: b57ba707566214f7a0019bc4739375ff9428b133484123dcf6fcc38ec4cd5ffe
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a PDF link farm. One of the primary links directs to a known malicious redirector, 'ttraff.link', which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains references to the 'stickam app for iphone' and the malicious URLs, suggesting a lure to potentially malicious content or phishing pages. No scripts were extracted from this sample.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/wix?keyword=stickam+app+for+iphone In PDF document text
    • http://zebikit.bankier.co/uploads/1/3/0/9/130969644/legikebidolix-suvidelewa-diwamik.pdfIn PDF document text
    • http://files.ormsbyguitars.com/uploads/1/3/1/6/131606819/kizixazino.pdfIn PDF document text
    • http://vuxopad.medtechwearables.com/uploads/1/3/1/3/131379730/7769098.pdfIn PDF document text
    • http://files.andrealimauro.com/uploads/1/3/1/4/131407423/964bdc984c.pdfIn PDF document text
    • http://norevukor.newageofheroes.com/uploads/1/3/1/3/131383839/wedeveso.pdfIn PDF document text
    • http://files.stchristophersnetballwa.com/uploads/1/3/2/8/132814791/pajisu.pdfIn PDF document text
    • http://files.mi-sheffield.com/uploads/1/3/1/6/131606368/niludavifek_rerodotite.pdfIn PDF document text
    • http://lozoruna.openbookseries.com/uploads/1/3/0/8/130874429/xobezovofoja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6e7e776b-753c-4b3a-a84d-4086bf3fbb55.filesusr.com/ugd/d99ef3_3297ab2e7c0e4a3f951e6e4ce58fb5f0.pdf?index=trueIn PDF document text
    • https://ffdf500a-0edd-4152-a7ba-1dd489b5b662.filesusr.com/ugd/55e2c6_d69d564121374b0f9258c7d58f0c3940.pdf?index=trueIn PDF document text
    • https://8d4f8721-9b8e-4d79-8193-4f6fdd620c93.filesusr.com/ugd/3d0627_a56baf3f4da34c68bba1b74fbb0d6e12.pdf?index=trueIn PDF document text
    • https://50529b55-12fe-402d-8754-e017fdeb2bfd.filesusr.com/ugd/4f270c_574a10079f5b4d18a7400303e2f342e2.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5067/1007/files/wojarumaxubexizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/mathematics_formula_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/nuzowix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/xetifaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/algorithm_c_sedgewick.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B31 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off0000653a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653A 5000 bytes
SHA-256: 04217e7bbb7983f43bc02f608e1d7d0e90f6a2394fe07f1a4fdde3e1c9952754
font_02_sfnt_off00007607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 10740 bytes
SHA-256: b574e654236b0a869dd6ba683e50bccf4e826f9f19bd76142ddc49b80c3ddc59
font_03_sfnt_off00009aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176