Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc0c1d498697edb…

MALICIOUS

PDF

41.4 KB Created: 2020-08-25 17:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5cbbe3933e14ec049c33186fed8cc0c SHA-1: b8113cb2de0fedc0cbe0a09d07624382551eb958 SHA-256: 0bc0c1d498697edbe350bd20f2a8f35b262758d02eee2de654ebb658e40896a8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes text suggesting a lure related to a 'Clippers injury report update' and points to the malicious URL. The presence of many external PDF links suggests a link farm or redirection scheme designed to obscure the ultimate destination.

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/pify?keyword=clippers+injury+report+update
    • http://gijux.outfitterdesign.com/uploads/1/3/1/4/131437604/jafifevu.pdf
    • http://files.canyons-ea.org/uploads/1/3/1/3/131378942/vewaxovoze_jumitefasepu_vejagetaziwapuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/34651824326.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/brand_personality_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/64195542069.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/ibps_reasoning_ability_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/detagavezo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/deconstruction_and_critical_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/85292211116.pdf
    • https://cdn.shopify.com/s/files/1/0432/7614/0710/files/general_discord_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/balijike.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/40632938268.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_off0000637c.bin
7884ca1e3d483aaf154d07d7092fc815686efb95ec0ec21018acd96231eece03
pdf-font-stream PDF embedded font (sfnt) at offset 0x637C 5036 bytes
font_01_sfnt_off000074b1.bin
760831adb1ab23aad5175bc211c2067a207bae28a6bf5781308406da75415bd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B1 10688 bytes