Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e60af4edc5d8fd2…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 16:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adf854add24858065afdf36b1320d6f6 SHA-1: 1fb7ba57530e128cec367686a45c833ba3fa9b42 SHA-256: 0e60af4edc5d8fd2cc709240f4eaeb04506f8f190b2fe9a7e951d78f441c9dd4
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to distribute payloads.

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/wb?keyword=material%20resource%20management%20pdf
    • http://files.redimageproductions.com/uploads/1/3/1/0/131070520/a99bb5db692.pdf
    • http://bifez.appliedmicronanolab.com/uploads/1/3/1/6/131636725/5d5f49c5.pdf
    • http://files.callanjames.co.nz/uploads/1/3/1/3/131398000/ranurupowalos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/wimefefufoki.pdf
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/sasowemokefipejum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685913575.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/xoxuditidozob.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/winesisizowuxeladaj.pdf
    • https://cdn.shopify.com/s/files/1/0449/5199/4536/files/dusex.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/43187472369.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/vamajifulixumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4369/2445/files/40629864721.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0598/files/junejumugum.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6982/files/insubordination_write_up.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/97774439221.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/southeast_asia_political_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/biryani_recipe_in_bengali_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634f.bin
43a803abc35b9c991ca6d8d2764f3e8f90ef2bf1aba5a36dc32d9a4848415943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 5480 bytes
font_01_sfnt_off000075e5.bin
abbc6e47c4fede31f0a1fbc8ae39af7b25026eb7620422eabd0d72b655b55f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E5 10620 bytes

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