Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c96d01fc12a5fc…

MALICIOUS

PDF

44.6 KB Created: 2020-08-21 23:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010b17e535f1b210befc46de0821580a SHA-1: a53cd7379a4de46902d06f7e409d7d15a85272b3 SHA-256: 06c96d01fc12a5fcd348eb7984d169d2b2a74286b95ec5b50331d4f447db742a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms, disguised as a guide to emigrating to Germany. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong attempt to redirect users to harmful content. The ML classifier also strongly suggests maliciousness.

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=guide+to+emigrating+to+germany
    • http://pututu.vegantuneupcafe.com/uploads/1/3/2/6/132680835/0d249b701d11.pdf
    • http://files.tomadamsboatbuilder.com/uploads/1/3/1/3/131382330/mekoxosajamaruzon.pdf
    • http://kibezixon.mzsacredhealing.com/uploads/1/3/1/4/131453872/5855726.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5302/2369/files/engineering_mechanics_statics_dynamics_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/nofalogilomawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8626/6016/files/pisolenowanazulok.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/xamagivaka.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/89812106658.pdf
    • https://cdn.shopify.com/s/files/1/0429/0363/4079/files/tamasha_movie_mp4_2015.pdf
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/99329553985.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/revasibemuxotosel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/bengali_baul_song_audio.pdf
    • https://cdn.shopify.com/s/files/1/0439/7246/0702/files/alleviating_global_poverty.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/agreement_paper_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/underdark_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/71358046580.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_off00007129.bin
cd135bd3d0eb82bfc85d30ff0f3e30f26b26fa20ad8d2e8d056b0252748ce6a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7129 5068 bytes
font_01_sfnt_off00008259.bin
70f6a0e90860f6caa40b1dcce47def479039094c7aaf65eedd657960cbcaba5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8259 10288 bytes