Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f70ac6b3df45b5e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-29 14:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76771eb3383e3d541e155fef490fcc20 SHA-1: ee458e7f611939f299229f8219da1cd804046358 SHA-256: 6f70ac6b3df45b5e9e62a8e86f5f96aaee171566fff9145e214bb9fed6e921e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. It also exhibits a PDF link farm pattern, with numerous links to other PDFs hosted on Shopify. The embedded document body text, though heavily obfuscated, contains the malicious URL and references to SEO-optimized PDFs, suggesting a lure to a malicious site.

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/wix?keyword=bentley+mini+cooper+service+manual+d
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2484/1890/files/lunujilovu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/wafipoxiwipila.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/chromium_browser_ubuntu_16._04.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/95282831317.pdf
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/78122035395.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/xonojukifejililisazupiki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9507/files/kodiwomokon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/mysql_find_duplicates.pdf
    • https://static.usrfiles.com/ugd/f515ca_9fa671674f464b79a6496cd678f2771b.pdf
    • https://static.usrfiles.com/ugd/b8c837_72ac287dc92f407fb616400383bbedd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_feaca2158ed345b5a23ce8cb5d1b11aa.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_off000064ce.bin
dbce4060009cf09851e7f32e3964687fd01932a99bc27856f5c5d4188ae933fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CE 5432 bytes
font_01_sfnt_off00007734.bin
8422c893612758a6b934dd3cac9613f5df935c9771ea4285be200bfe35704b0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 10412 bytes