Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ccc446cf19543e…

MALICIOUS

PDF

41.0 KB Created: 2020-07-11 16:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c51deb2bfc2711a32e4256afe5e61d6 SHA-1: 8b9061cf79da47c74ab9b31fa21d0b8baf8eac4b SHA-256: 30ccc446cf19543eb6fb04239969b0a6fa0391d4db59a7c98a5fcd3807fa2ce9
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to WordPress and other file-hosting services with seemingly random filenames. One URL, 'https://ttraff.com/wb?keyword=adobe%20acrobat%20pro%20convert%20pdf%20to%20form', is flagged as a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. No scripts were extracted, and the document body is heavily obfuscated.

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.com/wb?keyword=adobe%20acrobat%20pro%20convert%20pdf%20to%20form
    • http://files.merakidesignagency.com/uploads/1/3/0/7/130775737/bevixebogedemasit.pdf
    • http://files.tommypikecustoms.com/uploads/1/3/1/1/131164567/pofaguvuvawixejixuru.pdf
    • http://files.clarastarck.com/uploads/1/3/1/4/131453985/zuvinebesupagilu.pdf
    • https://juvavapu.files.wordpress.com/2020/06/896482130.pdf
    • https://gitumonas.files.wordpress.com/2020/07/dukipuvazetanipabe.pdf
    • https://fadadidigar.files.wordpress.com/2020/06/17559588980.pdf
    • https://jokurana.files.wordpress.com/2020/06/81027593240.pdf
    • https://fudixanetad.files.wordpress.com/2020/06/kurali.pdf
    • https://popibilowon.files.wordpress.com/2020/06/zuwowexipedupafedamojoj.pdf
    • https://kanuwajatido.files.wordpress.com/2020/07/73335160297.pdf
    • https://pobotipuzin.files.wordpress.com/2020/07/gamimobun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/tepivakewewigawenu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zokiwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/nejaxijoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/42468909229.pdf
    • https://cdn.shopify.com/s/files/1/0431/2609/6036/files/jusegujowotimipiralezat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0430/4312/7447/files/3931319218.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a3.bin
78bff94d35ed7de305308d7ca58e1d9e72ce2fcce26e1fe449026f3f22764418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 5020 bytes
font_01_sfnt_off00007498.bin
73d5f30bcf401050eea388780c8fac923ffd367be02626f787ee4c9b3b9f320a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7498 9996 bytes

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