Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e62e1704fc3768…

MALICIOUS

PDF

37.9 KB Created: 2020-08-24 04:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e62da9dbfaab237d70b345c1e5634de9 SHA-1: 2c7e0171c0795f00dfdb86f786d6b9ecf430b497 SHA-256: 69e62e1704fc37684dde7eb206a87670be01be9dd650bf87e38c41b7b65cfb85
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to direct users to malicious sites. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content or phishing pages.

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/pify?keyword=hotel+formule+1+villeneuve+le+roi
    • http://files.zoom-travels.com/uploads/1/3/0/7/130739754/wajedesijavuniw_wikukatefujize.pdf
    • http://files.mygrandmabakedacookie.store/uploads/1/3/1/4/131453053/70e628.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/alveolar_sounds.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/botellas_de_agua_comestibles.pdf
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/took_me_by_surprise.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/deadman_wonderland_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0461/6686/8120/files/dragon_ball_games_no.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/93935920584.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/teach_yourself_beginner_s_russian.pdf
    • https://cdn.shopify.com/s/files/1/0459/7311/0951/files/problem_solving_examples_with_answer_and_solution.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/avrdudess_2._2.pdf
    • https://cdn.shopify.com/s/files/1/0429/1752/7715/files/20859482307.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_off0000549c.bin
50e9f13b8c3ac6dc37c0f6a8342e95a63cd68c4ca78b41346d457334e4671c46
pdf-font-stream PDF embedded font (sfnt) at offset 0x549C 4600 bytes
font_01_sfnt_off00006432.bin
94c37f7d69fedc9ace90477a9df0c505b7ba53640f1793bbe7ce9d4e67ea5635
pdf-font-stream PDF embedded font (sfnt) at offset 0x6432 11832 bytes