Malicious PDF — malware analysis report

Static analysis result for SHA-256 119b54b01e460aeb…

MALICIOUS

PDF

40.7 KB Created: 2020-08-11 03:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e02dfa09fb6a78159c0cfef21a3f4e02 SHA-1: 36441a1671a2f2c9bcf70bf44556cdeb666a1b30 SHA-256: 119b54b01e460aeb3d1908ac5f2124f88f38f9aa050625798cb368413fa00604
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to further malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL confirms a malicious intent to direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/pify?keyword=bracing+cold+formed+steel+structures+a+design+guide+pdf
    • http://files.oakridgewachtelhund.com/uploads/1/3/2/7/132741144/simivotidip.pdf
    • http://mamodamok.powerboxingfitness.com/uploads/1/3/0/7/130738615/kugiporivor.pdf
    • http://files.renovationsunlimitedllc.com/uploads/1/3/0/7/130740524/f95fc7cd80ed3c8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizazuvolabemonixodokij.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/54277330936.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/67306319928.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/xiviraduminemeni.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/kofuxexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8541/4056/files/tawafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/pepasejofebole.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/caida_libre_introduccion.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/simple_past_vs_present_perfect_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/nuwurig.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/52847702336.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052ba.bin
46853114ca89d06ececbd6ae350daed54a74f91967e5e7a2937c17c55fe4ee53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BA 5404 bytes
font_01_sfnt_off000064fe.bin
3a3a1add1b62ef9fa9c5de46fbd5ac0e42ac3796ff5ff398bddcf439f113b8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 10148 bytes
font_02_sfnt_off0000879c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879C 4324 bytes

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