Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c33555a78884441…

MALICIOUS

PDF

33.2 KB Created: 2020-08-21 01:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b08e22594c92763609b49aa414fdb44 SHA-1: 6597e2d3aedaafe75ba3bb5d1ae632295e779cae SHA-256: 8c33555a788844410bf6f651bfa6b40e00aab0f499b46f64aab9f67b0c35a533
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it is the primary lure. No scripts were extracted, and the PDF structure itself does not indicate exploitation, but rather a social engineering or SEO manipulation tactic.

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=international+phonetic+alphabet+worksheet
    • http://peniwum.rylandhowardaudio.com/uploads/1/3/0/9/130969336/f925e91.pdf
    • http://xeduke.family-heritage.org/uploads/1/3/1/3/131383309/4859301.pdf
    • http://files.kalispellkindersandmore.com/uploads/1/3/0/7/130739470/e3ec63.pdf
    • http://files.sorrentoreview.com/uploads/1/3/2/3/132302888/dijewidifijozuv_maruxizuxubifik_fipenab.pdf
    • http://files.harrillconstructioninc.com/uploads/1/3/0/9/130969300/davitozumasoxum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/87799132550.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/40526307596.pdf
    • https://cdn.shopify.com/s/files/1/0465/0657/3982/files/apple_app_store_without_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/tacoma_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18396470220.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/mixaforegilowore.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/55188563881.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_off00004403.bin
985ba7ff62fda85596578c0d11438a470f81a7146315d63c6beaafc4810ace47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4403 5256 bytes
font_01_sfnt_off000055dd.bin
358c5be7e532b0058452b5fa5b2316df52c2e53acf29b5ded9734e384dac6c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DD 10004 bytes

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