Malicious PDF — malware analysis report

Static analysis result for SHA-256 43fd27c2c450124d…

MALICIOUS

PDF

116.5 KB Created: 2020-08-14 22:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6580e83667d15f40d8d09ad86caa8fc6 SHA-1: 7c8af618046b5e3d1bdcd620c6676952ad11e2a6 SHA-256: 43fd27c2c450124df38992d17ee74cb811d33871599e8b40f3cfede7aeb17bfe
176 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating a malicious redirector and a lure for advance-fee scams or fake invoices. The primary malicious URL, https://ttraff.cc/wb?keyword=obligations%20and%20contracts%20jurado%20pdf, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting it's the intended destination. The presence of numerous benign-looking PDF links on Shopify domains is likely a SEO-poisoning tactic to improve search ranking for malicious content.

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=obligations%20and%20contracts%20jurado%20pdf
    • http://bipezif.thebramedic.com/uploads/1/3/1/3/131380429/pinalolotiva_xizisabogova_retilupojola_lagex.pdf
    • http://files.7thbattalion13thartillery.com/uploads/1/3/2/7/132740423/6e1217fd.pdf
    • https://cdn.shopify.com/s/files/1/0435/5420/9943/files/1073894850.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/98247780373.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/zenejuburerawaduwepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/buoyant_force_formula.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/aasm_scoring_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/how_to_find_facebook_url.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/famuzaxukutiv.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/python_truncate_string.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_off00017762.bin
f111867ce3975c393fb6debc4297bfa67e45eeb62384634d2f246d09d37573ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17762 5564 bytes
font_01_sfnt_off00018a56.bin
70ffd29e1a1800695f28504f149bde18f590b8af4ae99f1fc36fe9e2f8e78057		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A56 10964 bytes
font_02_sfnt_off0001b006.bin
7ce5d4216a683abc7f7d8590681e99f92aa98484a77088abc3f6f2466aaac040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B006 16084 bytes

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