Malicious PDF — malware analysis report

Static analysis result for SHA-256 653621a3135a653b…

MALICIOUS

PDF

72.0 KB Created: 2020-08-09 00:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38f3b325049808b593724259327a44d4 SHA-1: 7415fdd346b33c610229e5cd91854916fad603b1 SHA-256: 653621a3135a653b08995f2bee258cd495cf141136f242be7b1ef75fa55af398
162 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a redirector link to ttraff.com and a PDF link farm. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=naphthalene+structure+properties+and+applications+pdf, which is a known malicious redirector. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=naphthalene+structure+properties+and+applications+pdf
    • http://files.thetlacademy.shop/uploads/1/3/1/3/131384789/dupive-madelubupazape-dezarekinoza.pdf
    • http://files.skinboutique.shop/uploads/1/3/0/8/130874627/fbf0527.pdf
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.pdf
    • http://files.amberalysson.com/uploads/1/3/1/0/131070678/0f929af100393.pdf
    • http://files.rinconcasa.com/uploads/1/3/0/9/130969703/rifomo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/21519330701.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/poweramp_music_player_trial.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/vukusoguluzo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/linux_administration_commands.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/24465752085.pdf
    • https://cdn.shopify.com/s/files/1/0434/4869/6993/files/73526143103.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/ralelo.pdf
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/75598428750.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/51976686288.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4693/files/ziretidamipo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/tojafakalozufasakiz.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_off0000dd6f.bin
c6418733e7132cd8b8504ab5b2d9218f0edf5af2e75a5a6d1cbac4be8079d0ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6F 5212 bytes
font_01_sfnt_off0000ef28.bin
9b47f2fc9d45cf9beb2e5745cfdb251dc9d4885fa5b48fc877f4289acddfad1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF28 10376 bytes

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