Malicious PDF — malware analysis report

Static analysis result for SHA-256 790e319510186330…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 06:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8497d9e8c1ef7829478d7ed1a0ce98f SHA-1: c1742d581d6695f78fca66acd0bf6bcbe7d81854 SHA-256: 790e319510186330db51736b76aea0b8952109eed1efab99b12a3fb9c41c1d8d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded URLs that lead to a known malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to a Craftsman riding lawn mower, likely serving as a lure. The presence of numerous external PDF links, many pointing to benign Shopify URLs, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

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.ru/wix?keyword=craftsman+21+hp+riding+lawn+mower+pa
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2358/7733/files/guninu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/90046650619.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/41461555925.pdf
    • https://cdn.shopify.com/s/files/1/0436/1099/6899/files/fgo_gamepress_halloween_2019_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/88781403620.pdf
    • https://static.usrfiles.com/ugd/b8c837_626a42b00ac241278c55a1596d4feacd.pdf
    • https://static.usrfiles.com/ugd/f8de3e_f471ad27d4e6449eb5b7019758eb0dd2.pdf
    • https://static.usrfiles.com/ugd/26481d_8044eb410986408b91952208d2128191.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/geraint_fuller_neurological_examination_made_easy.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4694/files/minecraft_1._8._8.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8118/files/rexazavelagex.pdf
    • https://static.usrfiles.com/ugd/b8c837_98999d05c9434b8fb7a634a0e4bb6b43.pdf
    • https://static.usrfiles.com/ugd/b8c837_21f6cabfffad41a5b9899de05f52b16f.pdf
    • https://static.usrfiles.com/ugd/3dd68e_596d7631385241eaabc63b1d28f3e3a7.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_off00006969.bin
a9f0f34b6f55c6ac544f67e2745760a61f6a58b794bf2bac2aa8bbc0a52e45d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6969 5636 bytes
font_01_sfnt_off00007c7b.bin
ffb61e79e36c94df733214a812df53543a40c9aecf9f30b4adbe1b0671c5b0ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7B 10168 bytes