Malicious PDF — malware analysis report

Static analysis result for SHA-256 06975b415822d5be…

MALICIOUS

PDF

39.2 KB Created: 2020-08-19 15:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d27690833740c29446e29bb948ffc9e3 SHA-1: 388b959057a43711e2efa82e03306c4473a42eb9 SHA-256: 06975b415822d5be37128dde58febb2d8e70911bed6c699f1511945248c4f36a
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.cc/pify?keyword=bendix+acom+diagnostic+software'. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=bendix+acom+diagnostic+software
    • http://jisakejak.sigepemory.com/uploads/1/3/0/7/130776330/nolapopoku_zomikifow.pdf
    • http://files.kalinkapetkoff.com/uploads/1/3/1/3/131380128/5585f84ea2de.pdf
    • http://files.bearvalleykidscamp.com/uploads/1/3/0/7/130740018/kisokuf-sevevimafujum-gisigiv.pdf
    • http://raroviw.weaverplasticsurgery.com/uploads/1/3/0/8/130874493/tilutis.pdf
    • http://files.adriannaelizabethphotographyandmakeupartistry.com/uploads/1/3/1/3/131380299/2873827.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9564/4573/files/duwuga.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/93749130474.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/82701662721.pdf
    • https://cdn.shopify.com/s/files/1/0435/8383/2227/files/chehra_masoom_punjabi_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0431/0541/9418/files/80508091067.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/pawokofaxufarazebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1069/5074/files/flowers_for_algernon_audiobook_progress_report_14.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/xetibomum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/kupifebopit.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_off000057b4.bin
f2ba689a934bda20c8a514230b9fd344aa428430d7a06bbe09d34ed750b7984f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B4 5520 bytes
font_01_sfnt_off00006a73.bin
2131c70b1e8a677edd685792f5b01a836706296451bc66b453e9ceeeb376bc9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A73 10692 bytes

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