Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebc006e8037bce9…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 05:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e56b9af3c3d142afd8d31b98286eb093 SHA-1: 5852ded6f5f5138a5691852d7a96b4f6559fd82b SHA-256: bebc006e8037bce96cf595e0e685b288cfc09f5712a0735a4dc334ef20fbc0da
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.ru/wix?keyword=2008+mercruiser+5.0+mpi+manual, which is likely used to lure victims into a phishing or malware distribution scheme.

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=2008+mercruiser+5.0+mpi+manual
    • https://cdn.shopify.com/s/files/1/0454/7385/7686/files/accident_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0460/5909/4171/files/defenseless_hearts_meagan_brandy.pdf
    • https://cdn.shopify.com/s/files/1/0428/8443/2038/files/best_music_video_s.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/mureseten.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6471/files/63863703455.pdf
    • https://static.usrfiles.com/ugd/4dd980_2c8e061e836841139e8ff0df65b3451c.pdf
    • https://static.usrfiles.com/ugd/89363e_556d8a386b68424b94eab959e4e66ccb.pdf
    • https://static.usrfiles.com/ugd/12f4eb_73da9c676cac46758499953e0185a061.pdf
    • https://static.usrfiles.com/ugd/b8c837_46075f672294434e80e36ac09a0966c4.pdf
    • https://static.usrfiles.com/ugd/0dd040_767acf6cf58f436797f440d22de5bd0a.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_off00005b34.bin
5c68115128377ba4d30b420db382e3e9f1c888ee660a3849f6b4e84a17a10f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B34 5608 bytes
font_01_sfnt_off00006e28.bin
21360a0b37039d27a6695f93c698d8adf1b629a6776b4571e0f0c031948d18ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 10448 bytes

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