Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6cdcef36d047dd…

MALICIOUS

PDF

39.6 KB Created: 2020-08-28 09:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ac92801085dada3bbb84ab33fbf806 SHA-1: 553b459b4431fd0bb6d87ce56c59dddab8e4f531 SHA-256: 6f6cdcef36d047dd52bcb76a861042d4015bed5da57a0b234d1bd77c0a60b547
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is likely the primary malicious payload delivery mechanism. The document body text, though partially corrupted, includes the same lure text and URLs, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/pify?keyword=databases+illuminated+3rd+edition+pdf+download
    • http://files.chenale-extensionsllc.com/uploads/1/3/2/6/132695644/1551419.pdf
    • http://files.beautifulcardcompany.com/uploads/1/3/1/4/131453288/917bbd.pdf
    • http://wowit.primariuscorpservices.com/uploads/1/3/1/1/131164110/pexifun-dutogituf-gedezodakosene-bigenetuf.pdf
    • http://masowowu.walkaboutfarm.ca/uploads/1/3/1/0/131070718/xiterowu_lokarax_bapupebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/2887585574.pdf
    • https://cdn.shopify.com/s/files/1/0430/9981/6090/files/42296635445.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/40557527745.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/kotokurokodasesomudawus.pdf
    • https://cdn.shopify.com/s/files/1/0454/4741/3910/files/beginner_english_grammar_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/98620213218.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/epic_emr_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/unit_6_test_study_guide_similar_triangles.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/welafirifiweretibip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/xotolijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0433/6153/4111/files/hungry_shark_world_hack_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/laser_cutting_machine_for_sheet_metal.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b00.bin
2ed1952e4f9de9cee35b9f73da14183a65d8d41927d7334274e59516d7027503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B00 5580 bytes
font_01_sfnt_off00006dec.bin
7119091bbf8f1346a89d1c4867d5e370dd9cad923bebee2a5fd4d2d2894f5795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 10352 bytes

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