Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd559d062422072…

MALICIOUS

PDF

44.7 KB Created: 2020-08-16 18:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a5e2a7cdd1a79cfd5d3d1e6f215de03 SHA-1: b4466c8439829b89b1e4f34722c95f4c38e4ee12 SHA-256: dcd559d0624220720efd5307d8e88abb026f020d6b8e3f2a8de227922f710d65
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the text 'Charles law chemistry lab report' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document title and a malicious redirector.

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=charles+law+chemistry+lab+report
    • http://files.superiorkitchenhealthysolutions.com/uploads/1/3/0/7/130776503/zutudawinidi.pdf
    • http://files.theblogofdoom.net/uploads/1/3/0/9/130969403/c484e90694d.pdf
    • http://files.fbcwashingtonks.com/uploads/1/3/1/3/131379236/6365223.pdf
    • http://files.bodtkergolftour.com/uploads/1/3/2/6/132681516/171a95ecb5cfc73.pdf
    • https://cdn.shopify.com/s/files/1/0448/4051/7792/files/how_to_make_a_clicker_heroes_game.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/30530361398.pdf
    • https://cdn.shopify.com/s/files/1/0439/5764/9566/files/15385316819.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/craftsman_snowblower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8682/9981/files/effective_academic_writing_1_answer_key_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/43426556927.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/73525829708.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/50810454614.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_off00006f4a.bin
9d07d7ab543bc14d5583b6f05ded801d647acfec82503ae5a2b6fff3831defb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4A 5412 bytes
font_01_sfnt_off00008198.bin
3d3e7a5eb4afea64a277ee49f8502039220f14d0a9ce9e2db0f7d3f4bc9d81c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8198 10824 bytes

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