Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c221bb76b11cf2…

MALICIOUS

PDF

47.1 KB Created: 2020-09-01 16:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ccd8c2fed85c1d42a42ad5a2db92768 SHA-1: 6b1655aa39ca9958cc4daedc56e5b0de39dec5e3 SHA-256: b6c221bb76b11cf20f6ad0f5a2c8659f79aed968f85b46b4f2f306506585cbd8
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains a lure suggesting a quiz with answers and an urgency element ('action required within 24 hours'). It embeds numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/wix?keyword=implementation+methodology+final+quiz+answers'. The PDF also contains a link farm pointing to other PDFs hosted on Shopify. The primary attack vector appears to be social engineering via a deceptive document, leading the user to a malicious URL.

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/wix?keyword=implementation+methodology+final+quiz+answers
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/54129083702.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3493/files/adult_ov_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/jowukikibadiguwasijaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/77527817122.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/buwarebujuzil.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/ff13_lightning_returns_achievement_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3091/files/ejemplos_de_introducciones_de_antolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/lufibagek.pdf
    • https://cdn.shopify.com/s/files/1/0461/7994/2553/files/zabevuturewiwixoxobuwek.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/action_bar_text_align_center_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/amours_de_voyage.pdf
    • https://cdn.shopify.com/s/files/1/0463/5652/9318/files/jukuruxabet.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_off000075e8.bin
0ababadca68d8a09e0b00fd69f2d7dca7cf2170a1a24ff3e95d33a5824abb875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 5764 bytes
font_01_sfnt_off00008975.bin
1fa0f1cd8f92d662c8a54cb9fff81482f04640f39d7862cd7897bb45f97710e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8975 11136 bytes

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