Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0f484cf8f31f62…

MALICIOUS

PDF

44.1 KB Created: 2020-08-18 21:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d907e2d767bf24688b8daf9e4f6b362d SHA-1: 9ce0bbd7db550bf70ad93d859d809559b6e9aaac SHA-256: fd0f484cf8f31f62a1ae81d00766a969790c91adfc2b7c76fced5b8c761c61c1
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector service. This suggests the document is designed to lure users to malicious content through a chain of redirects. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links, including those hosted on Shopify, indicates a link farm strategy to distribute malicious 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.ru/pify?keyword=male+gametes+in+angiosperms+are+formed+by
    • http://files.boonccb.com/uploads/1/3/1/3/131379409/podutamumedomofetexa.pdf
    • http://mozamer.ceremonymatters.ca/uploads/1/3/1/4/131413418/3a108375.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/29827059426.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/86724506273.pdf
    • https://cdn.shopify.com/s/files/1/0430/1157/1865/files/green_fire_quest.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/14207993367.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/4674010855.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6675/files/muduxaxipigosovanowalikaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/sakemeduwex.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/60014931236.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/77262708933.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/21518938066.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6390/files/60323098811.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/zeleginixubowabogevukuto.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/9099427692.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_off00006ef4.bin
2c137070f7512e25f1581fe69b5d7d45082e31ff6d0fba4da3b751915646dff5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF4 5608 bytes
font_01_sfnt_off000081f6.bin
ea68deacdee77b70ede94866a1b46f90f5c24482684550e46f90ca5f65ff5685
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F6 9888 bytes