Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0259661411a1685…

MALICIOUS

PDF

53.6 KB Created: 2020-08-29 23:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35f9450421290d83f55f95c8bd0583ec SHA-1: 7a2756ff791eef907e4d14eb5ed5317b5c74a497 SHA-256: e0259661411a1685f07404c2fc98119193d5506ae630f1c3f393f464e4599792
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, under the guise of providing a biography of Apostle Paul. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness.

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.com/wix?keyword=apostle+paul+biography+pdf
    • https://static.usrfiles.com/ugd/b8c837_b107720b1cf5421ab279440d713f8153.pdf
    • https://static.usrfiles.com/ugd/b8c837_936e6d706b1745e681c286eb4167454a.pdf
    • https://static.usrfiles.com/ugd/1be480_e21499111ef8420ebb4c0381bb06b882.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4693/files/learn_japanese_language_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/98698467005.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/75641565359.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/dapiwukukaraka.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/bozagopezajij.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/11396986684.pdf
    • https://cdn.shopify.com/s/files/1/0438/8408/5416/files/steve_jobs_book_review.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/arietta_slade.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/37682807847.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/diwekagarixerabasuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1541/files/tony_little_gazelle_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4596/1383/files/29927346624.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/moravian_workbench_plans_will_myers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008644.bin
29c13735a874011a6d53aa5651c30f159069c75e6c091cc02b8bb309ea09d3dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8644 5308 bytes
font_01_sfnt_off00009867.bin
2e1a17d036b9b817c93d73e8ecd2653630b8d2fed4babc6823f6a88d843dffb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9867 10308 bytes
font_02_sfnt_off0000bb2f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2F 4324 bytes

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