Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa67c653a584254…

MALICIOUS

PDF

42.9 KB Created: 2020-08-23 07:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1177ad84dcd6dbeab1b5e7dcd9b77388 SHA-1: c5eadb6ec4e02b42c0b7b37a970001170f12d366 SHA-256: 8fa67c653a58425418db95cc6c50defa419aed00684096c98a0c6b4c423b07bc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. Another heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs. The ML classifier strongly suggests maliciousness. The embedded links likely serve to lure users to malicious infrastructure or to distribute further malware.

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=bathymetry+survey+pdf
    • http://babaxugi.timetohealme.com/uploads/1/3/2/8/132814930/wagosizivi-ripiwetajesasex-pokipomi-kekosexoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0558/files/19077498820.pdf
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/32175705663.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/silat_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/52330388063.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/99289170354.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/15642002097.pdf
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/xasunutugafisoxituribika.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/12410885911.pdf
    • https://cdn.shopify.com/s/files/1/0440/7531/9448/files/pandora_s_box_full_story.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/animals_and_their_homes_worksheets_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0448/4674/3713/files/verkehrsschilder_und_ihre_bedeutung.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_off000063a0.bin
d864951d722db1a9a037fbe4796aaf59df56e87b86db0c51ed89d38e0872029b
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 5460 bytes
font_01_sfnt_off0000761c.bin
199499f66c37a1145aa7037074440707ab03ef40b96850ddc4cdb6da0b549d2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x761C 12156 bytes