Malicious PDF — malware analysis report

Static analysis result for SHA-256 0def98fa3c86b7ba…

MALICIOUS

PDF

32.9 KB Created: 2020-09-01 11:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 535660c1f148534a8efa8e99b8358a0e SHA-1: 96a6fb76ec75b2fa10db45c0777566d5e142e5cf SHA-256: 0def98fa3c86b7ba13001aaa4e69a1ccaa12aec6e02022bf02a83c174cf5699a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, masquerading as a "digital image processing ppt template". One of these links, https://ttraff.ru/pify?keyword=digital+image+processing+ppt+template, is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning.

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.ru/pify?keyword=digital+image+processing+ppt+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/26164728818.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/tukojugorifotazuvafer.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/50307112595.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/siegius_arena_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/lord_of_the_rings_timeline.pdf
    • https://static.usrfiles.com/ugd/bf07b1_d3166106055646c6b0e92d27a3e68b6a.pdf
    • https://static.usrfiles.com/ugd/1f5cef_3ec41f5074884a00a652c23deb46e648.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/david_white_transit.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/38747559451.pdf
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/rimidixegibexejanozim.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0ce30be00e344cbada7ca0ea8cfc5bf.pdf
    • https://static.usrfiles.com/ugd/77941b_d51d4af9bff844769668123f83a0f31c.pdf
    • https://static.usrfiles.com/ugd/ecec20_d6da7e0866864a2b8df0165e7326775d.pdf
    • https://static.usrfiles.com/ugd/e5a943_151b758323ec4ae7994714f9a71555af.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_off000043d6.bin
d74783a56208a6a528181cfd298064f819b969731559b5886d452b027830a337
pdf-font-stream PDF embedded font (sfnt) at offset 0x43D6 5252 bytes
font_01_sfnt_off000055a6.bin
b06f707adcc681734d9e6b88a30d7308541e32321ddd0c49868f76239a04f36d
pdf-font-stream PDF embedded font (sfnt) at offset 0x55A6 9648 bytes