Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd6aad5549c1a89…

MALICIOUS

PDF

44.8 KB Created: 2020-08-13 19:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a70bcca495b824aaa1b8ba758a2ed2f SHA-1: 315f138164598e28b90efcb90ecca349d906a889 SHA-256: 9fd6aad5549c1a89f0dd27a9a2f6b9de1aadf28bec6658020a99d92cea8ade48
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL. The presence of numerous links to PDFs hosted on Shopify and other domains suggests a SEO poisoning or link farm tactic to distribute malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=marketing%203.0%20libro%20completo%20pdf
    • http://didol.krisjezakart.com/uploads/1/3/0/9/130969204/808b71ebdf.pdf
    • http://baritu.groundhogproof.com/uploads/1/3/0/7/130738799/vokivuvilubigimig.pdf
    • http://zoreze.canadiancraftcompany.com/uploads/1/3/0/7/130776855/d75f5ff.pdf
    • http://zegudo.omgyummy.com.au/uploads/1/3/0/8/130873995/4421668.pdf
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0773/5969/files/marriage_life_in_islam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9607/files/gozigikufobizomewifude.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/photosynthesis_powerpoint_question_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6893/files/kadambari_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/sims_freeplay_cheats_android_2016.pdf
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/fakuvarusanewalisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/87345389268.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/91159298084.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/nubenibotuluruzadevom.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/rafal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3763/files/nugikira.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/e_waste_management_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/thoughts_on_agenda_setting_framing_and_priming.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/61645699603.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e68.bin
62bb90c1939f5ec92120e15dc3571fc2f26748874a20f2b0f8aa89a4c4027fa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 5632 bytes
font_01_sfnt_off00007180.bin
360d72de05aff0156caf6e71b3db5331abb225a803c6eeae369d0716c3d6b8da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 11304 bytes
font_02_sfnt_off00009634.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9634 4324 bytes