Malicious PDF — malware analysis report

Static analysis result for SHA-256 5015aa4f930f255c…

MALICIOUS

PDF

39.5 KB Created: 2020-08-03 05:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9ce657e7644f5c5997c987089fba5f9 SHA-1: 8410988b28183437760306861fd237b1f6972b8e SHA-256: 5015aa4f930f255c5cc3d7f60243b5e839a0d164a29799b7bd9c15ebf073fb6c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to click on the malicious link, which is likely part of a phishing or malware distribution scheme.

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=manuel%2527+s+vintage+room+menu
    • http://files.bluefrenchieofallen.com/uploads/1/3/0/7/130740049/5908960.pdf
    • http://files.learningwellteachersonline.com/uploads/1/3/2/8/132814136/8dc74f86e3.pdf
    • http://kuzanob.melanieveazey.com/uploads/1/3/0/8/130814017/4019662.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/cet_time_now.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/fajomabidumal.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/tuxex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/gotokutudexefij.pdf
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/39219393865.pdf
    • https://cdn.shopify.com/s/files/1/0451/1108/3160/files/donkey_kong_country_3_rom.pdf
    • https://cdn.shopify.com/s/files/1/0439/3644/8667/files/bewixuwuxufogobadoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3680/2204/files/muzaputib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6726/9532/files/ninutuzipemivasumedi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/star_wars_battlefront_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.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_off00005c9b.bin
3bb367edfe1ff95fabaf58261c6598fab3bfa0bfb57a33200f396d3e6429bc76
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9B 5104 bytes
font_01_sfnt_off00006dff.bin
1cd13b35bde343ef4f3d4bc5ce0d3dc0b2cf8587a3aa9f9334917c9981a98bc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFF 10292 bytes