Malicious PDF — malware analysis report

Static analysis result for SHA-256 078c3873f9a78e84…

MALICIOUS

PDF

118.0 KB Created: 2020-08-06 12:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c29e9f8230fc70defd099d14cb1bf4e5 SHA-1: 7e6a03a7855e704974c9eca2743aa508cca50a69 SHA-256: 078c3873f9a78e841d81461bdd80a81fcd2c0bb8482be753d287c67bd46ad22c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating it points to a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=assembler+directives+pdf', which is also flagged as malicious. This suggests the primary purpose is to redirect users to malicious infrastructure, likely as part of a phishing or content-luring campaign.

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=assembler+directives+pdf
    • http://files.oleanderpress.com/uploads/1/3/1/6/131636642/mugonebod-guwijebufi.pdf
    • http://files.velez.com/uploads/1/3/1/3/131398100/1500944.pdf
    • http://bodumavop.bloomstudioandgifts.com/uploads/1/3/1/4/131406390/e9c72f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/2755/7526/files/abjection_and_miserable_forms.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/boss_me_80_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/sopobato.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5256/files/kozufapotomamunosiler.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/81427437195.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/73501195806.pdf
    • https://cdn.shopify.com/s/files/1/0437/0238/6856/files/what_does_nsfw_stand_for_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/nuvarepunimivusumune.pdf
    • https://cdn.shopify.com/s/files/1/0435/1583/8618/files/21297065178.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/28516292422.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/77565491683.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6042/files/87827131200.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/kidigixaput.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/2988451359.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_off00018790.bin
08da33a808f2fb76ab8dadf56de9c8675d058ab04d7b1e3a53a9adecb8f889de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18790 5280 bytes
font_01_sfnt_off0001996f.bin
97e7be536551391eb8012290dba9fed23dc3a90fa393d3d642add0a69841aaaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1996F 15496 bytes

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