Malicious PDF — malware analysis report

Static analysis result for SHA-256 f609a34348a9fdff…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 00:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb024e70a38a84f589376dad967594d5 SHA-1: 478571f60c6baf0cc8ccaa9eed7e5fc24eece39e SHA-256: f609a34348a9fdff3fa217e601f11bade57bf131af973ef495e177553fc51d13
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'bakery branding mockup free'. This URL redirects to the malicious infrastructure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, but one suspicious link to 'buxubog.groovycoolstuff.com' was also found. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=bakery+branding+mockup+free
    • http://buxubog.groovycoolstuff.com/uploads/1/3/0/8/130813528/ed1906977ff496.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5194/files/negative_prefixes_advanced_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/80411353357.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/westlaw_doc_and_form_builder.pdf
    • https://cdn.shopify.com/s/files/1/0437/0071/5674/files/creeping_thyme_planting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/28265042.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4056/files/96276241697.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/38605292664.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/86590753807.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2301/files/nakemakuzunugaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/wuxepolonuwuverase.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/nyc_rent_stabilized_lease_form.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_off0000595f.bin
5b50b0d5845c63f3954e4a980222ddca58997686be0c261ec4151021c97f4d7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595F 5620 bytes
font_01_sfnt_off00006c7a.bin
26cf1c6767cf3f925a4d3e3af09276f62306fa5af05dc8c01cd43a602400de5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7A 10196 bytes

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