Malicious PDF — malware analysis report

Static analysis result for SHA-256 9268bad907cae813…

MALICIOUS

PDF

38.1 KB Created: 2020-08-05 04:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea24cefb9f9cb3730065abbdb7cea0f9 SHA-1: 22a6553886afc7e419c228fd8a47cf56f760e027 SHA-256: 9268bad907cae813d1e0c9788bc38235070080ca8fc02cff4d9e791591e9c807
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.cc/wb?keyword=phonetics%20manner%20of%20articulation%20pdf'. This indicates a phishing or scam attempt, leveraging SEO link farming techniques to distribute malicious content. The document body, though heavily obfuscated, contains the same URLs, reinforcing the malicious intent.

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.cc/wb?keyword=phonetics%20manner%20of%20articulation%20pdf
    • http://files.vegetarianbutcher.org/uploads/1/3/1/1/131164081/ff15420a.pdf
    • http://files.crengtech.com/uploads/1/3/0/7/130776055/suwalitamisot_ferunodos_fowixolag_warapimolazu.pdf
    • http://files.trinitydentaloffice.com/uploads/1/3/0/7/130739225/c728027c6798bdb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/17889729200.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/bunokanorumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/90234172624.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/sileta.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/99274556333.pdf
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/1708127111.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/runic_dungeons_mod.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/pugukesub.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/38457856268.pdf
    • https://cdn.shopify.com/s/files/1/0434/3680/2204/files/83639845620.pdf
    • http://en.wikipedia.org/wiki/Manner_of_articulation
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005842.bin
671271505430fbde7fc984fec2b31b2299f746d2617488757dd65a8f68d87c9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5842 5396 bytes
font_01_sfnt_off00006a71.bin
5a47af64bdc1a41b503c597d4a8c5bd68a96bfc58eac383dddde6e4fb88e6777
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A71 9756 bytes