Malicious PDF — malware analysis report

Static analysis result for SHA-256 162f3903ff611b07…

MALICIOUS

PDF

77.0 KB Created: 2020-09-17 08:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80616b29cb6477a1527da3f7eebdd550 SHA-1: 3b91e45e8c38298891c6fda2d901069c9718e0be SHA-256: 162f3903ff611b07309e8645cb7da7d294deb023c0044ba130f231ddac69b864
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or to distribute further malicious content.

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/wix?keyword=lego+minifigures+series+14+plant+monster
    • http://files.malbeads.com/uploads/1/3/1/3/131379792/jakixuku_bivubaxoreres.pdf
    • http://kelubuku.tlcnashville.org/uploads/1/3/0/7/130740190/9911267.pdf
    • http://nuvegebox.dressagering.com/uploads/1/3/1/8/131871390/227ed546c2dc.pdf
    • http://dasuvif.hummingbirdchicago.com/uploads/1/3/0/7/130776445/dalelexametamil.pdf
    • http://moveb.stoxandco.com/uploads/1/3/2/6/132683014/fixudo.pdf
    • http://files.legacyiig.com/uploads/1/3/0/8/130813846/xomefotavabuti-bifediko.pdf
    • http://files.region7imcat.org/uploads/1/3/1/3/131398498/gunowudataza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://970a87bf-addb-4bb1-9fc6-97941262d760.filesusr.com/ugd/f3bfbb_f49bcfc37fa5430eb1703639e55dfee8.pdf?index=true
    • https://6c1c9174-f30e-447a-9f52-599bfaa4d892.filesusr.com/ugd/38062a_a546c882b0764de59e4b5e364de70f62.pdf?index=true
    • https://40d8a7d2-199b-426c-bd12-cdc6e83086b7.filesusr.com/ugd/1ee69b_33fd93a08eb04fdbadd1ebf6a7868e69.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/89240741455.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/public_policy_analysis_handbook.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_off0000f08d.bin
79b4cdba5dd270753d694aaf6482744c491fda20703708c3af4197048aaad0fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 5304 bytes
font_01_sfnt_off00010290.bin
2e2eb4f7e206b33addb995cb934adae0b3b1577444e03de21389380147e2a60a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10290 10648 bytes