Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ded3fc2d3eaed9…

MALICIOUS

PDF

39.8 KB Created: 2020-08-21 08:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0404b532d8b6ea090f395847dc19a4d3 SHA-1: bfa56ebef7c299633f0dd4b3bd94770484d8ac58 SHA-256: b8ded3fc2d3eaed93b158d4b2ebe3d74e00b2fb66a0b7289ad97eb0b3e381530
150 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 a redirector service (ttraff.ru) or are part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains a URL that appears to be the same as the redirector. This suggests a social engineering tactic to drive traffic to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=como+se+forma+una+galaxia+espiral
    • http://files.4heartcounselor.org/uploads/1/3/1/6/131606159/e2078d60fd2fac.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/furekew.pdf
    • https://cdn.shopify.com/s/files/1/0431/8596/3168/files/napco_1632_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/vekujerex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/vunet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/92078930861.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/92971796312.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/70240877250.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4307/files/morth_technical_specification.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8359/files/anexo_18_oaci.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_off000059bb.bin
ae93e011ce4adeab7db32a9e6f00abcb47197a2f538e25764d8dd29908b61d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BB 5196 bytes
font_01_sfnt_off00006b55.bin
ae3284d966efccb1ac80e4b711c9fe63279412a49b7c49184a11167ee13ffa2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B55 11700 bytes

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