Malicious PDF — malware analysis report

Static analysis result for SHA-256 b843377c09860f72…

MALICIOUS

PDF

39.1 KB Created: 2020-08-10 02:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f9cd35c8dcd4f4cce8c01b60b3af567 SHA-1: 103297b70b1bbd5c51875b6eafdb1f472c1d46b3 SHA-256: b843377c09860f727bc0ec26ae495d429080bf71e0dd81b87ef65a62cda9da82
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to a known malicious redirector, specifically 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, points to a link farm strategy to obscure the malicious destination. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

Heuristics 3

  • 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.
  • 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=yaseen+shareef+pdf+download
    • http://files.anekaingold.com/uploads/1/3/2/6/132695531/10be3010c.pdf
    • http://files.theragirl.com/uploads/1/3/0/9/130969277/9296062.pdf
    • http://files.melissasmith.net.au/uploads/1/3/0/9/130969980/edab7bd5cb018c.pdf
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/zalafaserozipeminusozasi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7264/files/baguj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/thermoelectric_cooling_peltier_effect.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/golujebudifujolunosetu.pdf
    • https://cdn.shopify.com/s/files/1/0447/8858/0512/files/cengage_physics_for_jee.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/solesorumajetivofidet.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/4723873220.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/354766333.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/punctuation_test.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/dawolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/partnership_agreement_contract.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/warizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/bangalore_metro_route_map.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_off00005d71.bin
37d64a15fc39b538937ad53e82814b266a2810b55fb796d807888ccaa1ad1b23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D71 5180 bytes
font_01_sfnt_off00006f1e.bin
656e8b28f82317f4f567001874070060a0dc7c75950385a50dc6bc7f3b3b8d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1E 9580 bytes

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