Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d0f2a53d4b489c…

MALICIOUS

PDF

52.5 KB Created: 2020-08-16 15:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26231182c9a0806b5e0e7e671f661844 SHA-1: 760920b2de08ca1edde963662cb59e016b77a919 SHA-256: 44d0f2a53d4b489c87ba3058c6327ea51995c85ecf44ef8c815cca5079f36520
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to domains associated with link farms and redirectors, indicating a phishing or malicious redirection attempt. The primary malicious URL identified is https://ttraff.ru/pify?keyword=alone+season+6+episode+guide, which is flagged as a malicious redirector. The document body, though partially corrupted, also contains this URL, suggesting it's intended to be clicked. The ML classifier strongly supports the malicious nature of this PDF.

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=alone+season+6+episode+guide
    • http://files.saledomesticappliances.co.uk/uploads/1/3/1/4/131452794/7b10f496bf7656.pdf
    • http://files.setgogym.co.uk/uploads/1/3/1/8/131856772/zulivasavupapo.pdf
    • http://files.retreatinsider.net/uploads/1/3/1/3/131379803/mafafat.pdf
    • http://ridabam.diannaedwardsandwriting.com/uploads/1/3/1/3/131383297/8066511.pdf
    • http://files.ogreartwork.com/uploads/1/3/1/8/131871648/30943e.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/el_cuervo_edgar_allan_poe_poema.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/35143035131.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7137/files/27162484975.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0993/files/json_to_xml_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/simipirabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/22_oxidation-_reduction_reactions_practice_problems_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/eu_type_ii_variation_guideline.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5691/files/noxel.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/cbse_sample_paper_2020_class_10_download.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c30.bin
5d4a6c055208ecbe91f4f61bcb354c56eb052a3a74bb03c7870f9f1c86d07707
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C30 5172 bytes
font_01_sfnt_off00009dd7.bin
b8d39a4c5c99611c144a8efcc50443a4420bbf0221f79c24dedeea4001d28e20
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD7 12092 bytes