Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f6dc36f3eb48ec…

MALICIOUS

PDF

35.6 KB Created: 2020-08-31 04:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2815cdec6ed7ac57522bc67f5742c37d SHA-1: c49ff9818101c33cc7f9152db90295128326928c SHA-256: f0f6dc36f3eb48ec4824a9ca16dc577db1771d8ffe545ace8396eec6049e5754
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to adult content and the malicious URL, suggesting a lure to a phishing or scam site. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=beautiful+babe+porn
    • https://static.usrfiles.com/ugd/b8c837_27a1d5dae6d6492e9c161aa61f94b069.pdf
    • https://static.usrfiles.com/ugd/b8c837_11aa4c9333a142c0af0c7741f0e27970.pdf
    • https://static.usrfiles.com/ugd/b8c837_58fdfc4a8f1b44278fbdad7c90667232.pdf
    • https://static.usrfiles.com/ugd/33c377_8886c9f3952c4532ba2ccfe9e43ef0bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_00191878d2d44b108b73b7e30072052f.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/erika_girardi_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6618/files/45647623725.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/10970108534.pdf
    • https://static.usrfiles.com/ugd/b8c837_e90bf73675f04c30b8fc7ed03ca40738.pdf
    • https://static.usrfiles.com/ugd/3bca44_dfd553e2271c421ca0e533db2afff22f.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb2342e4cc7149548583e6331d9b8661.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f06.bin
cf4e9fb5a57a7a5274f1b83c003805a1441bd7848b713695130b1a6dffc2f28a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F06 4908 bytes
font_01_sfnt_off00005fbd.bin
7e0da593dadd172baea476c614beef105b4d5ba69378ffb0474e10731a554119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBD 10128 bytes

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