Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c2d5a94d722c79…

MALICIOUS

PDF

42.4 KB Created: 2020-08-20 19:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ede29e380b5996e8d3cc983725ce5b8 SHA-1: f13714ce559367e48a6204b429b110e825c7b409 SHA-256: 06c2d5a94d722c79c040ee418a8817aef152a5700ad834f9a7ebe1f1d0515430
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector service, which in turn points to a Shopify URL hosting a PDF. The primary malicious link is disguised as a useful template, indicating a phishing or social engineering lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm or redirection tactic.

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.com/pify?keyword=google+sheets+calendar+template+october+2019
    • http://files.nataliepriester.com/uploads/1/3/0/7/130775982/zebenapune.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1765/6731/files/most_offensive_song_ever.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/19314958142.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/fakineravapuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4971/9720/files/36968097016.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8545/files/kujemaxosatitojufiwe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/neguzuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/80890107068.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7374/files/keronumakonazozifapetuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/86133098007.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/cv_for_medical_lab_technician.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/37301100177.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/bohemian_rhapsody_fingerstyle.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_off000065a8.bin
5b165b6d7ca0b9ef8b16bab526b97248b2a7fc72c8b224b3129778074104a5a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A8 6140 bytes
font_01_sfnt_off00007a5e.bin
cdbcb07cd60201ab8dd99915a125edba4531d504bff050aabcfc05bcbab2646a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5E 10060 bytes