Malicious PDF — malware analysis report

Static analysis result for SHA-256 52425ae0242e5fef…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 22:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1060db0dd6ff08fa31a91a95272eb70f SHA-1: df817550e0f2cca5e11717f6896921155d5cd273 SHA-256: 52425ae0242e5fef680136c1e750eb7acee8a7e5ee72248c0f7a4bec897b4258
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to 'parking hang tag template free' and the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm SEO abuse tactic to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=parking+hang+tag+template+free
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/metapomirowozadurud.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4567/files/18671418926.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/80491308124.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/teoria_causalista_y_finalista_de_la.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0274/files/instagram_photo_app_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6783/files/sirekapimuzuwojoxejoxuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/preposition_direction_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/mozuvubatezaxof.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/fobujutonupeluji.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/6080221441.pdf
    • https://static.usrfiles.com/ugd/b8c837_946623de2c8d4ae1bfa3c9e658859ce4.pdf
    • https://static.usrfiles.com/ugd/b8c837_97ef641dd6e6401d8eb4ae363869ffc1.pdf
    • https://static.usrfiles.com/ugd/724fb5_c0e662b2ba3349f799c1084a00becc88.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ecead672ada402a9e1b088dc14511e0.pdf
    • https://static.usrfiles.com/ugd/60933b_224cffa8fd5d43ffac3fce504cedf0e2.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_e9df7c4d3c8a452c9bb99a54c0ce9a6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8bb8863f49b47658de09ba7c8d2a5b0.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_off00005cab.bin
b744b5dd8a7200eb6bd3fc4448b2afb58ecea54e84af198d0144612df9c0ce79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAB 5200 bytes
font_01_sfnt_off00006e39.bin
7146ae16280550456b5a6031b30407ae479831c963bb561c47ab772b18785609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 10940 bytes

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