Malicious PDF — malware analysis report

Static analysis result for SHA-256 b808e24d8fdb3075…

MALICIOUS

PDF

44.1 KB Created: 2020-08-29 03:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccf9955d3c0e3f030a6832b9d0b28fd3 SHA-1: 2b54f457ad4e78d91295c943cf3972d7ddcd6f58 SHA-256: b808e24d8fdb3075671f75560d8b8f9e31bafe53331fa107216196458a4cfb48
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic firing for a malicious redirector link. It also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external resources. The primary malicious URL identified is https://ttraff.cc/wix?keyword=land+navigation+pdf, which likely serves as a gateway to further 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.cc/wix?keyword=land+navigation+pdf
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/falcon_shocks_review.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/begapibusinisuweko.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0992/files/musifagemajirol.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/61265018704.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/50214859165.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuketunaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/niwixum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/nasimosezeguwuzodanawak.pdf
    • https://static.usrfiles.com/ugd/b8c837_af90e20f444e4385837840cf9242fc11.pdf
    • https://static.usrfiles.com/ugd/b8c837_951fbc97f0314ad6833cd4c16376dd10.pdf
    • https://static.usrfiles.com/ugd/b8c837_321509018dc64367ae7f55a15431404a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f43bf9bb8aaf49ecbaa661176d4b0ff7.pdf
    • https://static.usrfiles.com/ugd/b8c837_506ecb35fdbd4189b8bc2a72fbc73606.pdf
    • https://static.usrfiles.com/ugd/b8c837_52c0aabd9ede4b29a95bcca3a3c3fed3.pdf
    • https://static.usrfiles.com/ugd/b8c837_5efa5754b4034f06a5226a533c3911f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8df74262b403471d8adc9018a728f5bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_962fd79bb9d446a69a58baa2356dbaa9.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_off00006ecc.bin
ebbbf6ae5b90131e73dbd5aeba51348b7abe384b90d7ab333e23c8c6f2f37d04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECC 4904 bytes
font_01_sfnt_off00007fa2.bin
2828b1443c4f23f3e1f3d6405a5deacd9e3f7895e780506fd6bc43a513de99de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA2 10524 bytes

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