Malicious PDF — malware analysis report

Static analysis result for SHA-256 6038bfbff7c23aa5…

MALICIOUS

PDF

33.5 KB Created: 2020-08-30 22:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0d5d338dc6ff53963df4614f34a99ed SHA-1: f21bd504014dbaf9d28f07f9bcbe629461a91ec7 SHA-256: 6038bfbff7c23aa5750690a5855b9195fbb4f092f40d5955e542ac9c66fcd914
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a search result for 'piano sheet music'. This redirector likely leads to a malicious payload or phishing page. The PDF also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or malware distribution attempt.

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/wix?keyword=jealous+by+labrinth+piano+sheet+musi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/orchestrating_experiences.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/25344479803.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0440/2321/8341/files/bopekikejizewodewabalon.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/scenario_interview_questions_and_answers_for_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/totojixujemozuvilofaluxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/95599884277.pdf
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/dodezazadikogag.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/capacity_management_in_operations_management.pdf
    • https://static.usrfiles.com/ugd/55cc32_c17cc9c787214dab86d88d6ab6398f24.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb202433613e44efa46ec4588a2dae1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b97a0e3b72dc47ab8d3b8cce4610559d.pdf
    • https://static.usrfiles.com/ugd/906e9f_37c370038cf84f82840a7a75fda81f66.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4d71394db514285b0e877aaeb746780.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/gatekuwabonelo.pdf
    • https://cdn.shopify.com/s/files/1/0462/8273/5776/files/autowala_moi_assamese_song_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/moxuriji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/lusipuv.pdf
    • https://cdn.shopify.com/s/files/1/0439/3467/9208/files/flat_belly_diet_plan.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_off00004742.bin
67f541ed73f6b3043b30529df381a6f821f14924ca3e975754acb9909f6bea2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4742 5288 bytes
font_01_sfnt_off00005910.bin
8afd68fb67d57717283ef2344bb2dadc1c77beed40fa12a295d501598d256ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5910 9276 bytes

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