Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04250059f4c2f22…

MALICIOUS

PDF

40.0 KB Created: 2020-09-10 22:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd323678b791cb46d8c2b833c67e3313 SHA-1: 6350e4511ade4b0ee0306b2b08db40299f5fc9c0 SHA-256: b04250059f4c2f2275ca115d00d4fd311a69426c28b81507588335639d7ecc27
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure for 'template powerpoint freepik'. The presence of multiple Shopify and usrfiles.com links suggests an attempt to disguise or host malicious content among benign resources. 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.club/pify?keyword=template+powerpoint+freepik
    • https://cdn.shopify.com/s/files/1/0459/9562/2559/files/25837592807.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/gcra_bursary_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/9226/1529/files/28608840721.pdf
    • https://static.usrfiles.com/ugd/b0c8dc_e6411bdcc8744244aeab7ea03c7f3bc7.pdf
    • https://static.usrfiles.com/ugd/cf79db_7b6fd46b88c94eaaa7ebf5c455aca62c.pdf
    • https://static.usrfiles.com/ugd/a374b9_db34bb5ce8c245a98bfd3c0af0f9f48f.pdf
    • https://static.usrfiles.com/ugd/3d0627_545e3de97b674563ac68d1bce78974d7.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_474ef58530e647e09b3d6d56614fb9a6.pdf
    • https://static.usrfiles.com/ugd/bfbc46_4a5648934647420395cd57018ad914cb.pdf
    • https://static.usrfiles.com/ugd/704566_b597cc693356456f9a94efcc33247158.pdf
    • https://static.usrfiles.com/ugd/2ac701_ce9e479012b1404593cf39ec75bc2e35.pdf
    • https://static.usrfiles.com/ugd/5ea691_66c8d5a32277408bb27009c1b9a18440.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c18c599f1804bd293cf5e7b71338cb3.pdf
    • https://static.usrfiles.com/ugd/d5cf39_18a858e681524599ab1ed364d5c84dc4.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_off00006129.bin
ac228ecc6b4f751cd9aa47b3af229c12075c034d2b7bcd2897ca9027a362d3e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 4976 bytes
font_01_sfnt_off00007212.bin
6992be2f68b82d7cf9abb039d194c6c393f4ccf9dfa5bf38803abb2370935e1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7212 9796 bytes