Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb93535451137a95…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 08:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7165d8c6ed8c5645ebd29e5eab230fc6 SHA-1: 01b263882644352f5c4ab34d144e0fdd50ab5d82 SHA-256: fb93535451137a95faf2606947dd9549f873175a2d2ecb53b66b1f53bd61ee53
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 a redirector service (ttraff.cc) known for malicious activity. The document body, though partially corrupted, includes text suggesting it is a lure for downloading a book, which is a common tactic for phishing or malware delivery. The presence of numerous SEO-optimized PDF links further indicates an attempt to distribute malicious content.

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/wb?keyword=descargar%20libro%20operatoria%20dental%20barrancos%20pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/6/131606046/542189.pdf
    • http://tikoroduf.fullpotentialfitness.net/uploads/1/3/1/6/131637881/lesexi_gefoma_menepunorirukev_funur.pdf
    • http://files.ultimatemartialartsusa.com/uploads/1/3/2/3/132303175/2f08318bb0d3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/merrill_advanced_mathematical_concepts_precalculus_with_applications.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7352/files/rebax.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/20164762868.pdf
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/bopabuvomukekumi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/fosokewelivafubovegoseg.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/bevufuzoroloxilefopogo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/strength_of_materials_by_singer_solved_problems.pdf
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/73065647761.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/giranisufunopamu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/46666376099.pdf
    • https://cdn.shopify.com/s/files/1/0433/7975/3109/files/29155662456.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_off000065d5.bin
51a662637d197d874ac6941aadb77769a3af49ce8d9bc48b785a5a11b5e24977		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 5464 bytes
font_01_sfnt_off00007868.bin
d9f3b8d3ce1909e237eb51bbe953cef5b1d501b02c217b1c447db9329c8c4509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7868 10136 bytes

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