Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dafc5e222e1f4f2…

MALICIOUS

PDF

41.3 KB Created: 2020-09-07 18:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c55962c12495f855abb2c00f2b9aafea SHA-1: 8dbdbd82d130d98739d09c91009f82ace0cfb114 SHA-256: 6dafc5e222e1f4f28ee7eeacadbe2e0d9574d014c97760e43ff663248c68e8fb
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a user guide, aiming to lure victims to a malicious site. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO abuse tactic. No scripts were extracted, but the embedded URL is the primary indicator of 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.me/wix?keyword=proform+cardio+hiit+trainer+user+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/agenesis_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/wasufifemonebeliwemit.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/24406514295.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/88904016749.pdf
    • https://static.usrfiles.com/ugd/115d6e_40d02a3cf4ed4ae7b51e5710b1dd9342.pdf
    • https://static.usrfiles.com/ugd/f34323_38adcc6e29bf4678bb499d8d813078a4.pdf
    • https://static.usrfiles.com/ugd/11f207_64f97578f8a643379e2cac01a74f7c21.pdf
    • https://static.usrfiles.com/ugd/dcc11b_af00c20631c04e06a79e2d9ad1ca51b2.pdf
    • https://static.usrfiles.com/ugd/804ff6_8440ed0ce91040dd8cd0457ca520cf10.pdf
    • https://static.usrfiles.com/ugd/4826f5_892702ae5cfe4252b4bb6644809d6192.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_off0000632d.bin
19f78bbbc46f42c8e15ee0f32e8b014ea2c3dd179435ec0480e4d2cd406c254c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 5404 bytes
font_01_sfnt_off00007562.bin
0ff0abae51ae20d72e6cb2a3530f89ef9cc7387bfdf024a2345f07f7225c5598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7562 10352 bytes

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