Malicious PDF — malware analysis report

Static analysis result for SHA-256 085d148f113d9a78…

MALICIOUS

PDF

62.9 KB Created: 2020-08-09 17:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50890e35abfb93cea24a22a2a9fc884f SHA-1: 39a6eacdee0d7481392e8c345f84eaa271725740 SHA-256: 085d148f113d9a78fcdab2f52f223a459397a9cc452aa145609c395dcc440da9
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.cc' domain. This technique is often used to obscure the final malicious destination and bypass security filters. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a 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.cc/pify?keyword=makalah+filariasis+lengkap+pdf
    • http://files.susanemshwiller.com/uploads/1/3/0/7/130775639/pixixeselega.pdf
    • http://files.pagesinkandpaper.com/uploads/1/3/2/7/132740743/df180e.pdf
    • http://files.boshamretreats.co.uk/uploads/1/3/1/4/131407152/wozinewefokiji.pdf
    • http://files.ksguns60478.com/uploads/1/3/1/6/131607683/5221686.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0436/9816/files/1839882047.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/jetezedugewuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/2895978626.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/57060216186.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/cpu_scheduling_algorithms_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5263/files/59027720270.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/prelude_in_g_major_rachmaninoff.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/podupu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/fomurivofezigusedupemazif.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/24888525880.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/madozoxunotexu.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_off0000b90c.bin
7afa0b9cd5c8dbd95ae4c335da056ff69c6a5588737804305b2380075dc5662b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB90C 5372 bytes
font_01_sfnt_off0000cb5a.bin
1b052c429427c2f72f4f662dd9578a03c5f733b15704e1f874cfb8fcc24f7828
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5A 10344 bytes