Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c36c57f8004bc6b…

MALICIOUS

PDF

44.9 KB Created: 2020-08-16 15:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f68a4597043d651491f063bac5767a94 SHA-1: cfaf635e52c9a82942a7ec233d38d85545fb1667 SHA-256: 0c36c57f8004bc6bbbd39719df69612e7a778d66e038b5e3c27a88c9f15fbbde
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains URLs that likely serve as lures. The presence of a link farm suggests an attempt to drive traffic to potentially malicious or spam-related content, possibly for phishing or malware distribution.

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/pify?keyword=call+of+duty+mobile++google+play
    • http://files.sfepiphany.org/uploads/1/3/1/6/131637074/ecfadab4f1.pdf
    • http://files.misspeggysdogwalking.com/uploads/1/3/1/3/131379181/rozoveru.pdf
    • http://files.antlerspecialtygoods.com/uploads/1/3/0/8/130813887/4000979.pdf
    • http://kuwokij.worldchamptkd.com/uploads/1/3/1/6/131606349/513483.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/46248769094.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/ctet_question_paper_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/5447/2087/files/ny_dmv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3059/2160/files/9409117078.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/64054189745.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/82931582709.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/sanizito.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazutorigixasozesilax.pdf
    • https://cdn.shopify.com/s/files/1/0438/5583/9392/files/sql_server_date_timestamp_format.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b1.bin
15e4bec1dceaee862885a7764663529a0565bc10edd2e1d837947813ace25bbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 5128 bytes
font_01_sfnt_off00007443.bin
48ba1c0d4be0f0c4d71b3a484ad69c72ddac89d7274d9ee898fb807c80a54d28
pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 10636 bytes
font_02_sfnt_off0000989a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x989A 4324 bytes