Malicious PDF — malware analysis report

Static analysis result for SHA-256 123a7017680095af…

MALICIOUS

PDF

52.1 KB Created: 2020-08-30 14:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 065bb80e4561128922ea5d3f5158f8ab SHA-1: 42856eb926180a28ca968b47939bfe909af696e7 SHA-256: 123a7017680095af48b03a1686f327f0a1141ec02045d319b452035c69ddd163
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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. While no scripts were extracted, the presence of these links suggests an attempt to lure users to potentially malicious websites or SEO spam content. The ML classifier strongly supports the malicious nature of this PDF.

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=hgtv+fios+tv
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9328/7321/files/10168669715.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/2017_audi_q7_shop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/dikukoxomiwamebufanote.pdf
    • https://static.usrfiles.com/ugd/b8c837_94f15a7589ab442185a06ff5ac978955.pdf
    • https://static.usrfiles.com/ugd/a48928_afcb077e0805494f88849707cf183577.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7b2be44753840888bbca63315dc089b.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/nutrition_et_sant_cours.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8969/files/kikabigavilevusiza.pdf
    • https://cdn.shopify.com/s/files/1/0437/6693/9799/files/pilusopimofaxivezi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7480/4119/files/27096510524.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/73922984513.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/67862615458.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c59.bin
e84e90148e7f75a5120a880d18543f195d848bddba03626968e3dbd078b5e6d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C59 4620 bytes
font_01_sfnt_off00007c37.bin
6c07df2aa84800ca1d5e781d7b7c4e3921c5e7b234527cf41a33e192d99ceb77
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 15224 bytes
font_02_sfnt_off0000ac19.bin
44344d777475bc27302cf71c6ce9e96b5edcb3cf6b8673c7cacff1863add0d01
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC19 16348 bytes