Malicious PDF — malware analysis report

Static analysis result for SHA-256 86694ee6861e6877…

MALICIOUS

PDF

40.8 KB Created: 2020-08-29 14:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b133f69a3fe3063227b65245509c8489 SHA-1: f00ef6e02ab052eafd24783b5453dba7f2b0a984 SHA-256: 86694ee6861e6877fd8c0ca236e98c04264f70de9c48e054ca9b461a1906005c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are part of a link farm, with one critical link pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a lure for a Kubota L2500 owners manual. The primary malicious URL identified is ttraff.ru, which is used to redirect users to potentially harmful 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.ru/wix?keyword=kubota+l2500+owners+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/nubozaranis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/discrete_math_symbols_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/7246546038.pdf
    • https://cdn.shopify.com/s/files/1/0431/8861/7378/files/xelebofamalokez.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/3383612025.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c74718e4fbe434ea351fb67400623f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_012c1a48c59c4d30b027a1d7a6c9ffdf.pdf
    • https://cdn.shopify.com/s/files/1/0461/4707/6259/files/ardenne_high_school_sixth_form_students.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/10685173437.pdf
    • https://cdn.shopify.com/s/files/1/0437/9397/3405/files/18289792688.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/mifenawigega.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/medicinal_and_aromatic_plants_cultivation.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/professional_business_email_writing_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/bacteriologia_y_virologia_veterinaria_merchant.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/80189544210.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_off0000553e.bin
3ef8068aa92d50dd1e7c6ca8fb1b4b3bd77b851402889a51ef26419ed8fdee53
pdf-font-stream PDF embedded font (sfnt) at offset 0x553E 5432 bytes
font_01_sfnt_off000067b1.bin
9cb5003f78e400632e26f3a8629ab1412e3aa42e93cfc765529ee85fc1557b17
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B1 15552 bytes