Malicious PDF — malware analysis report

Static analysis result for SHA-256 f350f797f5c5f1e2…

MALICIOUS

PDF

52.0 KB Created: 2020-08-15 05:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed4c99202e1c51d0dc1f25d58d7d4cc7 SHA-1: d527a771641f61bf23f0d3b3e26b0c881b779773 SHA-256: f350f797f5c5f1e24d40dcef577c921603ea61afb4b57bdaff8d5bbf93527c86
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'poultry farming project report' and a URL that appears to be a lure. The primary malicious URL is https://ttraff.com/pify?keyword=poultry+farming+project+report+2000+birds, which redirects to other content.

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=poultry+farming+project+report+2000+birds
    • http://rakaw.conscious-pictures.com/uploads/1/3/1/4/131455069/farokeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/how_to_archer.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/death_certificate_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/23505059073.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/74437004368.pdf
    • https://cdn.shopify.com/s/files/1/0436/9154/0634/files/budget_plan_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/36007986683.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2057/files/honda_gx390_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/jojemutojilitit.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/55811585044.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/lolimivabuzezotujanadumes.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_off000081ee.bin
a69a970d2cea2ce5ca4b7a2c2ae0640b7f92ec47af65a5efddb5c14af9c82007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81EE 6068 bytes
font_01_sfnt_off0000967f.bin
f574b0494839d20c13be900c234774a0b21df46d49c698c991ff623be39acba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x967F 13996 bytes

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