Malicious PDF — malware analysis report

Static analysis result for SHA-256 c659195a00f01221…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 11:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59f590f737662a5044a706fccbad7950 SHA-1: f9b454bde4c5ccbb4ef5e0d5c8fa6933be7c604d SHA-256: c659195a00f012215325ed92ca05b75df16c8b0d2ef93254faf41bf21c747d02
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=antonyms+worksheets+pdf+grade+1'. This suggests a phishing or scam attempt disguised as educational content. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking Shopify URLs, likely to appear legitimate. No scripts were extracted, but the primary attack vector is the malicious link.

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/pify?keyword=antonyms+worksheets+pdf+grade+1
    • http://files.traveltripsntips.com/uploads/1/3/2/8/132814415/5d9a4a.pdf
    • http://dodelopo.humanizing-ai.com/uploads/1/3/0/7/130740178/nugodixufo.pdf
    • http://files.asp-nw.com/uploads/1/3/1/4/131437532/88dd9d38.pdf
    • https://cdn.shopify.com/s/files/1/0454/1127/0824/files/business_process_design_principles.pdf
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/88907461319.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/81287309163.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/tujezaxosavororipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/56653159849.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/97545570399.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/udp_coppersurfer_tk_6969_announce.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/bubosofurajowipovalubisox.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/relonatijevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/berlin_conference_1878.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/41958775537.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/9471206253.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_off000069cb.bin
981f1aa46666f7dcb30e68f3e7d35e6d292ba1a5ebe1c7f7bdf0d2f3efb97ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 5720 bytes
font_01_sfnt_off00007d44.bin
1716d468077a2189c90d91b091885027a9283b2b513ae5b5d85612f589dfb7c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D44 10596 bytes

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