Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae5d9dab7239c20…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 12:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ed0f2439a1101e7b211a8e45ef157a8 SHA-1: 86ad4e82ed45747645a09aabd201d97f0602bc4a SHA-256: 5ae5d9dab7239c20931d7bce8e9572cec455a7f0369b307338ab8f99b72af26a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of the URL 'https://ttraff.ru/wix?keyword=bf4+ace+23' strongly suggest this document is designed to lead users to malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, further supporting a malicious intent, likely for phishing or malware distribution.

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.ru/wix?keyword=bf4+ace+23
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/32009552384.pdf
    • https://cdn.shopify.com/s/files/1/0439/3969/2699/files/applied_qualitative_research_design_a_total_quality_framework_approach.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7618/files/nordic_trac_a2550.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8374/files/40792251115.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef1531130b8740b3b675943f0c4e103c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5275f14275f4be9b28eedb7b2fde6de.pdf
    • https://static.usrfiles.com/ugd/b8c837_587835a246bb40b29448abf5d98af683.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb8c03a029a6476ea009fba01b7ff9f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_96ea950b4b9c49b88412f97053ec8fae.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5a62a84d8e541e6be820ca2c849a746.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/achromobacter_denitrificans_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/gikawarubijotaj.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_off00006160.bin
a47287aef0754c8bdbece0ce130c7771333ed66048dd2668ba702fa6e0b1f68e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6160 5004 bytes
font_01_sfnt_off00007282.bin
e96a1941b14c29f58cc3383c752b2a96caba3b4888155564a9c330baef39f57e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7282 10432 bytes