Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad898314666c083c…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 13:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c44b4945383afe3b2df2565d5faaef3 SHA-1: 3d8cdaed1df6a3f7591ee2bc7563bcbc2bd55f60 SHA-256: ad898314666c083c9682a2affe48b0f233f4dd575fdc835f3687ee31dc544616
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains references to 'Officeworks drawing templates' and the malicious URL, suggesting a lure for users seeking templates. The presence of numerous PDF links, many pointing to Shopify domains, indicates a link farm strategy. The ML classifier 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.com/pify?keyword=officeworks+drawing+templates
    • https://cdn.shopify.com/s/files/1/0435/4159/4266/files/software_engineering_notes_for_mca.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/foxeravifotikolibaven.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8775/files/affirmative_action_pros_and_cons.pdf
    • https://cdn.shopify.com/s/files/1/0459/7265/2199/files/ad_aware_free_antivirus_offline_installer.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e801cfe74ae4804bee56ed40a5a27b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c66f3cb1b6c4f9f836da327d6c65b39.pdf
    • https://static.usrfiles.com/ugd/824332_3c821c396aa64484b4f06d9217119aec.pdf
    • https://static.usrfiles.com/ugd/6290de_5aacbf1434014b0a9c6a6606012f53d3.pdf
    • https://static.usrfiles.com/ugd/45fd81_7dcfa3b307f34c9ba004ea6e8b729e7f.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_cf1695cf3be64a379b8f0667d549566f.pdf
    • https://static.usrfiles.com/ugd/f0f215_3d99969ab6184e98a20df480946cdebe.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_de534973b46a4d64af92a9b6e25d2aeb.pdf
    • https://static.usrfiles.com/ugd/fe83c3_714f18fc16504198ac900c964d8f8463.pdf
    • https://static.usrfiles.com/ugd/40512e_af8b5542142c45b7b369b356e860a244.pdf
    • https://static.usrfiles.com/ugd/c20ea7_6ba947b05f6444198a91a659dcc3f89d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9317eb29db70495d88f1b505263542c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7e31de259ed46b0b528bd05ec5f20e9.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_off000049d5.bin
ab101ba735f1bf6dd2bc45ea95045b71ec7239ad2fac2f1a3da9ed010ebebdb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D5 5660 bytes
font_01_sfnt_off00005d25.bin
8007a810d908de74a1224e67dd7b362240be9024b2163b6014622ba58cbf49a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D25 8944 bytes

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