Malicious PDF — malware analysis report

Static analysis result for SHA-256 80714caca12aa7d9…

MALICIOUS

PDF

40.1 KB Created: 2020-09-01 22:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f67b2a250d116c49557bbc5f8a870011 SHA-1: 6d7f0745c46426547f2c9a2428bc7bbe4c61b7bd SHA-256: 80714caca12aa7d9d8535a99593f428b35ac8d47b4186f88b6c58be01a9c8c46
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.me'. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, suggesting an attempt to drive traffic to malicious sites.

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=bar+music+songs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/824332_c72ddd6009404f1a8f12d5e49f483dc3.pdf
    • https://static.usrfiles.com/ugd/db1da1_c94dad4173f14a70a1abf0eafdadbde1.pdf
    • https://static.usrfiles.com/ugd/1c90dc_203b22dcfd5340eabfeb36b968bfc88c.pdf
    • https://static.usrfiles.com/ugd/0e2875_e211491789534325be6eedc1d2583f40.pdf
    • https://static.usrfiles.com/ugd/33a16d_0ad384b06f0a44b8ae4dc6ce0ba25094.pdf
    • https://static.usrfiles.com/ugd/ce5d00_ccb2c371685f4b84a90928c5cd1d5dcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa69dcda05904dac861d848e4ad6c543.pdf
    • https://static.usrfiles.com/ugd/b8c837_740894a2559842da8337605579bd9dab.pdf
    • https://cdn.shopify.com/s/files/1/0434/5672/5153/files/96509601197.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/17776671328.pdf
    • https://static.usrfiles.com/ugd/be19e1_bbcf9e72faa049838a34f673ae4155ca.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_5276fbe7ff674461bf7e74fbf6dfa09d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a87f3a1e86b047a29fc930a9d4ecd5e2.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_off0000603d.bin
c497ed2812e6c2095e63a67fab6dcca56a0d10507aa939d2981be16819979ef8
pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 5136 bytes
font_01_sfnt_off000071a1.bin
500fe555db807563aed819bf37cf910dab970103cbbbd816a9a87e59db17dca4
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A1 10160 bytes