Malicious PDF — malware analysis report

Static analysis result for SHA-256 a685c4275ec1ba57…

MALICIOUS

PDF

71.7 KB Created: 2020-08-16 20:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a809479528fe54a384445ff73603123 SHA-1: fce8ad1c939aebfa9b3807c172b734cee28b88de SHA-256: a685c4275ec1ba57b2aac88a7a166d4c075a13d0075e11b5c9b2d8ff40cdfc66
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link and a link farm, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=coliform+testing+in+milk', which is flagged as malicious. The presence of numerous links to Shopify domains, many of which are confirmed benign, suggests an attempt to blend malicious links with legitimate ones. No scripts were extracted from this sample.

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.
  • 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
  • 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=coliform+testing+in+milk
    • http://files.tillerridge.com/uploads/1/3/0/9/130969085/cd2e6e.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/pisilax.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/tenemodadulobivek.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/agneau_de_dieu_pain_partag.pdf
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/nitum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/gexukaluruxenilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/43195254941.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/adobe_master_collection.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/gilakijifaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/57239296614.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_off0000c551.bin
99bc7c676fc4b932426064e48ae3bb681c59dcf34a8c9b58ae19cc3b930a66ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC551 4752 bytes
font_01_sfnt_off0000d55d.bin
176a83a3ee69874436fb09a3eb4bef1b2e80dfef1a4655a5222f00e59316c1be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 14896 bytes
font_02_sfnt_off000103ef.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 4324 bytes

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