Malicious PDF — malware analysis report

Static analysis result for SHA-256 49441998fe5f6478…

MALICIOUS

PDF

47.7 KB Created: 2020-09-20 00:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 084b449e30cd7ee91d50b31aeee7bc1e SHA-1: cfbac2297dbed531e648c41f330edf97c66fddd4 SHA-256: 49441998fe5f64787a8d434fcced617f5db4e75fb16c60cd4192f13bacaa28d0
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, https://ttraff.me/wix?keyword=guide+gear+teepee, which is a key indicator of the attack. The presence of numerous other PDF links suggests a broad phishing or scam campaign.

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=guide+gear+teepee
    • http://tokoga.jamesedwardhughes.com/uploads/1/3/0/8/130814328/064fe25.pdf
    • https://6e1f6fa5-7015-4a52-8ac0-eedb83e41a60.filesusr.com/ugd/debbe1_887af50b4ef34970b9e98e49ba8b9408.pdf?index=true
    • https://fe704872-1d5b-4208-973c-05b08e103118.filesusr.com/ugd/d5415a_e518b546863b49e6bd77508513f0cd2e.pdf?index=true
    • https://5f676ef3-4719-4c71-a4e8-88143b68ebe7.filesusr.com/ugd/26481d_e1511075beaf4f44b3baeb8b32d027ab.pdf?index=true
    • https://532843d4-3c61-4e5b-aab5-275e5d8419e0.filesusr.com/ugd/c722c2_1971765abf96497fbc2c46017b62c3f0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/calamity_mod_tmodloader.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/kokuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/xevagavotexaxejuvarujizaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/haynes_automotive_body_repair_painting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/86788321214.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/kosobogevorigapez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/14878720115.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_off00007e98.bin
d148b20220e63a02d427f39a90b6124f5a79aeb340295496d6cbd55d1a036d15
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E98 4948 bytes
font_01_sfnt_off00008f7f.bin
0ba3debb5f2e01737aa54cf74860576c35c85605bbdff6e30de7a0905c0e8591
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7F 10184 bytes