Malicious PDF — malware analysis report

Static analysis result for SHA-256 0155b974fbc281c6…

MALICIOUS

PDF

38.7 KB Created: 2020-11-02 05:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbdf02fabc42bd8f7a8b195cad6efddb SHA-1: 921f53e21e11ad780021f21ad770402dd0547f41 SHA-256: 0155b974fbc281c6fe6cb3a191b349341dd295cd154b17c5e5d2fd8dcaafcc4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged as malicious by an ML classifier and contains links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, some of which are likely intended to lead to malicious content or phishing pages. The document body contains obfuscated text and the primary malicious URL.

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://gettraff.ru/aws?keyword=old+yellow+bricks+lyrics
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5f8af72ea194c.pdf
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5f945af90a79d.pdf
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f8eb7bce57e8.pdf
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f8c6931ee2bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ec8d49d1-3a9a-44f1-b5ab-aded1f4d8a1a/jim_henson_pictures_logo.pdf
    • https://cdn.shopify.com/s/files/1/0502/5778/9108/files/enhancement_shaman_challenge_mode_guide.pdf
    • https://uploads.strikinglycdn.com/files/3f42d5ad-811e-4ab5-9a57-9e982b404549/mojozedeje.pdf
    • https://uploads.strikinglycdn.com/files/842e2ae9-b7fa-4280-964f-3f56eed742ba/ruluwigonibomafosi.pdf
    • https://uploads.strikinglycdn.com/files/28113313-49c4-4e51-94cc-6804a5865669/12652356351.pdf
    • https://uploads.strikinglycdn.com/files/6c14fcf5-ee82-4e53-9cff-97ffbc7f057c/fundamentals_of_electric_circuits_6th_edition_free_download.pdf
    • https://uploads.strikinglycdn.com/files/06ec2ef4-4016-4bd1-81a8-be70c061eca8/kekafovomusuna.pdf
    • https://uploads.strikinglycdn.com/files/22f89d5e-7be1-4ebd-9547-3a0a07e9fabb/mekalilegifegax.pdf
    • https://cdn.shopify.com/s/files/1/0495/9328/6808/files/moto_e5_play_case_with_belt_clip.pdf
    • https://uploads.strikinglycdn.com/files/0691eb79-6f45-475f-be29-e2047a0a2a54/tebisigeximotur.pdf
    • https://uploads.strikinglycdn.com/files/6b9d9d2b-62ef-4578-93c0-cfba683e07fd/zisikupup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e94.bin
7d67000c58b313879db4d4b3d14fa06bf0fda53a2b935a0d637be025dc9f51ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E94 4748 bytes
font_01_sfnt_off00005ed0.bin
d1eb8ced4de38218b57ad4532ec0a8e2f06b3e1f309b242a1e2c14465817854b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 9632 bytes
font_02_sfnt_off00007f64.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F64 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.