Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cfe717bc019f7f…

MALICIOUS

PDF

44.7 KB Created: 2020-08-02 12:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f25144b834aebfb59f501f8efe71774f SHA-1: 883bc16d9b65caad1da184ecf4b461c9d2ef6472 SHA-256: 06cfe717bc019f7f8925862bdab44cf29f057e230b8324b83c29395a69a12229
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.ru/pify?keyword=manual+tire+changing+machine', is identified as pointing to known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious with high confidence. The document body appears to be obfuscated or corrupted, but the presence of URLs and the heuristic firings strongly suggest a malicious intent to redirect users to harmful content.

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=manual+tire+changing+machine
    • http://files.tranquilpalmsmaui.com/uploads/1/3/1/4/131437984/tuvazeri_zesugux.pdf
    • http://files.gcontrols.com/uploads/1/3/1/8/131871721/2495933.pdf
    • http://files.gbbcnc.org/uploads/1/3/1/4/131438509/3186150.pdf
    • http://files.leapsandboundspt.net/uploads/1/3/1/6/131606758/sokebenaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/87224958483.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/82934576607.pdf
    • https://cdn.shopify.com/s/files/1/0438/0344/3361/files/zixevegimobimuxixuxujuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/8205/4813/files/54094651903.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/wevafuvegedexivabopovoti.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/fokijajafikobawufubisif.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/9634784958.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/72046068022.pdf
    • https://cdn.shopify.com/s/files/1/0439/1016/8744/files/89369648166.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/rubenigaxevinexefop.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_off000072c4.bin
0a7288b8f748afa8bdd56caea77b29ce2e47d1ea85ac3aa323f26ce47f6ed534
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 5040 bytes
font_01_sfnt_off000083ca.bin
61289f6bcf9047077150dba477777a10d1eca3dc5a46ff6e537f8b36376b2694
pdf-font-stream PDF embedded font (sfnt) at offset 0x83CA 10036 bytes