Malicious PDF — malware analysis report

Static analysis result for SHA-256 15679e7111d71da5…

MALICIOUS

PDF

46.1 KB Created: 2020-08-31 23:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12268ea124bbc0aaa792f332adbd12d6 SHA-1: 76fd86e77c604b20df962fbafaa6dfe789b36c3c SHA-256: 15679e7111d71da5a9a62b0ed9921895517d1e0ca0fe309cc91165c7ee3ecad5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to a URL that mimics a movie download. The document body, though heavily obfuscated, contains similar URLs. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm designed to obscure the malicious 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.cc/wix?keyword=aashiqui+2+full+movie+songs+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/dexilesituxiwetade.pdf
    • https://cdn.shopify.com/s/files/1/0438/4689/3730/files/xobafenupixubenaxijerow.pdf
    • https://cdn.shopify.com/s/files/1/0433/6336/9125/files/goxugefoni.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1175/files/bluman_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/form_utility_meaning_in_telugu.pdf
    • https://static.usrfiles.com/ugd/f63f29_72b8c78bcf42485e9d48d73768c7feb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f160cccd797b40dc8753f7f406c2e438.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1537bbddb36496ba8d58b19bf8e11e4.pdf
    • https://static.usrfiles.com/ugd/9ec29b_7157b3fa77ba42abaa6618fda90ed6b2.pdf
    • https://cdn.shopify.com/s/files/1/0435/2288/3735/files/abu_ambassadeur_7000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/16789877193.pdf
    • https://cdn.shopify.com/s/files/1/0432/8855/9780/files/jujesupunukuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/filutabiveposefef.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_off00006930.bin
5551b01e2d70b94f41814de130c85b61daebcc858b8fdb9e098e04c5331698f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6930 5488 bytes
font_01_sfnt_off00007bbc.bin
4b7a0c617fa87e6843a49e14f7282e8a8fcbfdf81b745184a772bbc2a1314952
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBC 15508 bytes