Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1612fd682c76f7c…

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 12:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f41a70c35e1128b0f3d607f17c91348 SHA-1: 5ae4ba90e9150ffbe56d6364632d2dbcbf6b55bb SHA-256: a1612fd682c76f7c03e09130e11fa68127f0cdd8ebb8d0399e7216efa256c61e
160 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 pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'Password-protected archive lure' heuristic suggests this PDF may be a precursor to delivering a password-protected malicious archive.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=criminal+movie+songs+ringtones+free
    • http://files.werotary.org.uk/uploads/1/3/1/8/131856435/458005.pdf
    • http://zuremubo.yellowheadauctions.com/uploads/1/3/2/6/132681579/fobowiroxubulito.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/berthold_akzidenz_grotesk_light_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7607/files/gazopeziranonugupidu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/3406945279.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/how_far_does_water_fertilize_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/ethical_considerations_when_conducting_research.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/ffxiv_triggernometry_triggers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/new_headway_beginner_4th_edition_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/dimenipirubokix.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1728/files/jumijafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8088/4129/files/vimibipa.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_off0000610f.bin
5de36247aea4d3c82df5e54424b1a7bafc50fbc2ac8c4d012ebf92650213083c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 5052 bytes
font_01_sfnt_off0000722a.bin
e78d9fc9dc84d459c9fa2946d1a88a34163550f9c6c7b2eea27f483ece8bfb4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722A 10076 bytes

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