Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d9a7c98f8dfd78…

MALICIOUS

PDF

40.2 KB Created: 2020-08-16 01:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e8ba34903340966586e3a3f23739e34 SHA-1: d31a6693d49239139350c260465cd97518ce68cd SHA-256: 65d9a7c98f8dfd789217e217ca431ccbdca7263cc56a5edaf8584922bc6744e3
154 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text suggesting it is a "Powerpoint template technology theme", likely a lure. The presence of numerous external PDF links, as noted by PDF_SEO_LINK_FARM, further indicates a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=powerpoint+template+technology+theme
    • http://vetabof.zuyu66.com/uploads/1/3/1/4/131407089/xajubixinozebazaruna.pdf
    • http://files.thehollywoodbuilding.com/uploads/1/3/2/6/132695546/zopozo.pdf
    • http://files.thefancypigeon.com/uploads/1/3/1/3/131398143/ripidodowuje.pdf
    • http://files.kretzmerconsulting.com/uploads/1/3/0/9/130969708/9bfecc2.pdf
    • http://files.distinctcopywriting.com/uploads/1/3/1/0/131070866/4841541.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5956/8037/files/81657124998.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/2006_chevy_cobalt_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/wow_cataclysm_4._3._4_twinstar.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/68379771707.pdf
    • https://cdn.shopify.com/s/files/1/0451/7848/6933/files/77956094836.pdf
    • https://cdn.shopify.com/s/files/1/0437/3184/5271/files/purge_command_discord.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/85195174776.pdf
    • https://cdn.shopify.com/s/files/1/0432/6408/2073/files/cbse_class_12_economics_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/classical_and_neo_classical_theory.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_off0000604b.bin
712a83cc23b9a537b4129e6eb1ff05ff19af5bf49af46a5381728849451cbb9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 5364 bytes
font_01_sfnt_off0000726b.bin
35747fadcf983369bf172b08680d07a11d9f20315b48b54796bb239d2f9105e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 9796 bytes