Malicious PDF — malware analysis report

Static analysis result for SHA-256 5812be2e9f61ad6e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 21:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8895c9f936922f7d58a2c47da22f3eb6 SHA-1: 6b3ffa3b2999dbe734f115bde45c7c78cf79643b SHA-256: 5812be2e9f61ad6ec471aee7e77c205ccab8bbb638b1e9fd4a95fd4d14056002
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute the malicious payload.

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=best+cheap+manual+transmission+cars
    • http://nawof.ironstoneconcours.org/uploads/1/3/0/7/130776043/xulafinigikis-pexozojewig-gabikejujo.pdf
    • http://files.montemumford.com/uploads/1/3/1/4/131406068/a9764e0fe3.pdf
    • http://files.working4god.org/uploads/1/3/1/1/131164372/4009033.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/39356727128.pdf
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/13227442779.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/folewawobipeba.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/wowugedon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/stardew_valley_how_to_use_furnace.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/wolejurimabazutixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/48336760999.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35031547028.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/taxumorolomixuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/17965888116.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/jozudakimota.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/roxowox.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_off00006f2f.bin
f08432742880256104ec4e1750871d9da8dbf07f27bdb72411228e575251d26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 5224 bytes
font_01_sfnt_off000080ca.bin
54a5ae9773ada94bfa14b1b07f68dbb781a4683d696eaf0220dcf3d1a3e06026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80CA 9816 bytes

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