Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1e2499bb58db77…

MALICIOUS

PDF

41.5 KB Created: 2020-09-18 14:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 773ee11221f80a8a5ac0f16c4647c4cf SHA-1: 55ccbc96837d716af636831eb3e35a4f4caddfa7 SHA-256: 7c1e2499bb58db77a7e2e46e50fd763e788a36cb78e694ca68a964db4e96c916
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised as a download for game cheats. This is further supported by heuristics indicating a malicious redirector link and a PDF link farm. The document body contains obfuscated text and a URL that appears to be part of the lure.

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.club/wix?keyword=ace+fishing+cheats+for+android+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/wd3_myworkday_primark.pdf
    • https://cdn.shopify.com/s/files/1/0434/6262/3394/files/adharmam_movie_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/woxowodufarujama.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/25691453597.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/chinese_for_dummies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/6083985048.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/rivabinovalujajuxis.pdf
    • https://cdn.shopify.com/s/files/1/0477/3393/2188/files/99_mitsubishi_eclipse_rs.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/kuxitumifalotivitagif.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9644/files/hipospadia_epispadia.pdf
    • https://dfd2ffbc-c074-45cf-be23-2fb76b987a96.filesusr.com/ugd/9f69bd_affc2516f1a145a8a03ce40d0098af0e.pdf?index=true
    • https://429065f5-ce57-49b9-ace3-b39dd6cb9990.filesusr.com/ugd/f1780b_0c7a8c1673b341bb902b21b1af5fa9e3.pdf?index=true
    • https://2ce6c974-6396-426c-85bc-393d6ba7725f.filesusr.com/ugd/dbbfd0_d3e9b435b3544b75aa1da95223594275.pdf?index=true
    • 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_off00006343.bin
4b0e473e96f55d0c4743de441a364cfc72900acd9940eac21cfcbff04cdc4b2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 5240 bytes
font_01_sfnt_off00007512.bin
efd5874957c45ec938c96835dea1187848258922a2ef003232ccc5a8510d1be0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 10652 bytes