Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c8550e2c64a677…

MALICIOUS

PDF

48.7 KB Created: 2020-08-19 22:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e597c325e292c4021bf4272b6cd861d SHA-1: 2edd224ceb291240fa1d434a683e5a6449e48a05 SHA-256: 25c8550e2c64a677c6db453bdbc11d02ab2b8efc2c2350666f8d068bfb2f09e6
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=ms+word+flyer+template'. This indicates the document's primary purpose is to trick users into visiting a potentially harmful site. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to obscure the 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.cc/pify?keyword=ms+word+flyer+template
    • http://kaxobex.manssonmarketing.com/uploads/1/3/2/3/132303079/pumeruvikorim.pdf
    • http://files.sylvanherskowitz.com/uploads/1/3/0/9/130969148/8db092b2b749.pdf
    • http://files.thetorigroup.com/uploads/1/3/0/8/130813869/62f108ef.pdf
    • https://cdn.shopify.com/s/files/1/0435/1511/7727/files/combinatorial_topology_alexandrov.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/80435321740.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/99302621045.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/xazuposozudiza.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4179/files/52083895110.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/6283873598.pdf
    • https://cdn.shopify.com/s/files/1/0438/2418/5506/files/vewagekefivimeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/limajeweximo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/10139874376.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60359225188.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_off0000737f.bin
8434cfccaea6b805146d2d8ac297676f6b7dbe7dfabb7a462736b5156ed212a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 5020 bytes
font_01_sfnt_off000084b3.bin
dd9e4501a789f447182010c2c8ccce819562fb40ef2eb9a2be83622f297ab02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B3 10400 bytes
font_02_sfnt_off0000a830.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA830 4324 bytes

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