Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b357bb479689920…

MALICIOUS

PDF

44.1 KB Created: 2020-09-04 04:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 233d6125402320b3fcb5d5c1206bfa82 SHA-1: d95837586a302a995d8d0326d144185e98a579f7 SHA-256: 3b357bb479689920ecb75cb522d18812165e9bc6521a7d48e9b7d2f80606a88c
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating it's a malicious redirector link. One of the primary links directs to 'ttraff.club', a known malicious domain. The document also exhibits characteristics of a PDF link farm, with numerous links pointing to external PDF files hosted on platforms like Shopify. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=federal+climate+change+report+november+2018
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/eccentric_reducer_development_formula.pdf
    • https://cdn.shopify.com/s/files/1/0461/4396/3299/files/zapowogexufigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/gilipurinutedojatobaso.pdf
    • https://cdn.shopify.com/s/files/1/0436/0624/5534/files/76209108849.pdf
    • https://cdn.shopify.com/s/files/1/0435/8691/2415/files/mimomidigejakokugovisaz.pdf
    • https://static.usrfiles.com/ugd/3fb742_6371ed55ad43458abdbef7ff9916b94f.pdf
    • https://static.usrfiles.com/ugd/4cd51e_877702299853432292d6453495adb4d8.pdf
    • https://static.usrfiles.com/ugd/6d45f6_55a86d0270234958beda33ebccafc76c.pdf
    • https://static.usrfiles.com/ugd/66f3f9_6c5db1c06d644a8484e6e8640e2ee0ea.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/xijemopole.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/nidulorokunefeziledaleb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/anticipation_reaction_guide_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/administracion_de_empresas_mineras.pdf
    • https://cdn.shopify.com/s/files/1/0437/3266/4481/files/guyton_and_hall_textbook_of_medical_physiology_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0464/2403/1384/files/goaliath_542727_gotek_portable_basketball.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/gaxagomifemuwibadej.pdf
    • https://cdn.shopify.com/s/files/1/0436/2128/6050/files/ahima_code_of_ethics.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_off00006b6d.bin
ab23aa61b0320491393019a711452fdccc0656c7a47c718e1aa1eec7fa21600f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 5984 bytes
font_01_sfnt_off00007fac.bin
e50b44a122b041279118ac0206e07e96fe8afae13d845c6e6372fd837fc571ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAC 10444 bytes

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