Malicious PDF — malware analysis report

Static analysis result for SHA-256 e088c9ea8f9c81b2…

MALICIOUS

PDF

40.8 KB Created: 2020-09-16 15:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5401f6f9326e9379730aa22438ca2f9 SHA-1: 767156b87b8293b7e604986ff5ede51535b40849 SHA-256: e088c9ea8f9c81b286282d17a5b471ee743ba1b56ea9a1c0d620e36903b3701a
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.club, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL and a keyword suggesting a lure for users searching for specific software. The presence of numerous links to Shopify-hosted PDFs, while some are benign, suggests a link farm or SEO manipulation tactic to improve the ranking of the malicious link. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.club/wix?keyword=ics+camera+apk+filecrop
    • http://mekuve.valdeckerphotography.com/uploads/1/3/0/7/130776133/giwolu-xositozubinu.pdf
    • http://files.waywaystore.com/uploads/1/3/0/7/130775017/lobesulavizuwupule.pdf
    • http://files.stspeterpaulretreatcenter.com/uploads/1/3/2/7/132740692/kamejozisekosem_dasusewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/25768880301.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/jolilarisijapilo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/mcmaster_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0465/3557/3654/files/zekakamag.pdf
    • https://cdn.shopify.com/s/files/1/0434/3149/3784/files/45358581077.pdf
    • https://92d57ef1-3ddb-446e-a267-82dc643b3641.filesusr.com/ugd/c5d40f_198c9412e5da4afc8681b0676a058098.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0450/5419/7910/files/stay_hungry_stay_foolish_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/pojugesaxizuxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/adaraya_agamaki_sadun_perera_song.pdf
    • https://cdn.shopify.com/s/files/1/0439/2520/9256/files/21959980829.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/88342989519.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_off00006060.bin
cbec78706504fe829bc9b6a2507de361d1e05839e1a15848a293ce8c86767e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6060 5160 bytes
font_01_sfnt_off000071e0.bin
feab12269225fd4c11e3ad9a0f06f84ea8ab6a53c577b621b5d7b06315aee340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E0 10804 bytes

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