Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb7e8ed70226426…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 08:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1a6a03acc84482bd374e5ac165e852b SHA-1: 720db46dce1ca48aa320e126a072825e67695917 SHA-256: 3eb7e8ed702264262c5bf1b609a7fe02aab0058050bf48d2351c3d63fdd7ee62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to a fishing reel and the malicious URL, suggesting a lure. The presence of a link farm heuristic further indicates an attempt to distribute 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.ru/wix?keyword=mitchell+308a+fishing+reel
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/54966751191.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/a_bronx_tale_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/16893118726.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/87053237980.pdf
    • https://cdn.shopify.com/s/files/1/0460/6820/3675/files/86882510171.pdf
    • https://static.usrfiles.com/ugd/b8c837_30a319ecbfb8443d8351d97a3c243ee1.pdf
    • https://static.usrfiles.com/ugd/b8c837_59d43a8d6cb24b2589552ae7dbc850ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbb6e42560cb4eeca66c1ba5b356fa2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a0d2140dc5c485c8c0658163308a9da.pdf
    • https://static.usrfiles.com/ugd/b8c837_cebfd4218f284c44a4ef5ce093e729b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a869ed50d9514b0c9edd6909e39da331.pdf
    • https://static.usrfiles.com/ugd/b8c837_76758413ac8b4756a5640b3d42018e38.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_off00005b81.bin
4b0ce37c90853afd6f645c2ab88b9df17cf07d52ebc6d7451d383e6345781244		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B81 5648 bytes
font_01_sfnt_off00006eba.bin
be4525877ae334e66e9d542699749cfb3005335471575ac7609b31610a8b782c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 9892 bytes

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