Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfba3c5a29221176…

MALICIOUS

PDF

49.3 KB Created: 2020-08-06 08:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc7496fd820684f502456d9f9b5c6a13 SHA-1: 32c025864622686faf5dca901538b8d30e8ac6c5 SHA-256: dfba3c5a292211763441622fb65e7c3664c09d7d21a36b3f478676fdffef619b
152 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding numerous external links, many hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same suspicious URL and several Shopify-hosted PDF links, suggesting a coordinated effort to distribute content or redirect users to malicious sites.

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=neoliberalismo+e+educa%25C3%25A7%25C3%25A3o+pdf
    • http://files.northernbeachescleanupcrew.com/uploads/1/3/0/7/130739450/1b928af2.pdf
    • http://files.fourfeathersalarm.com/uploads/1/3/1/3/131379113/38ac33dfa389a.pdf
    • http://tegex.maltipoos.org/uploads/1/3/2/6/132681556/9656521.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/git_rebase_origin_master.pdf
    • https://cdn.shopify.com/s/files/1/0440/2236/6366/files/51420510134.pdf
    • https://cdn.shopify.com/s/files/1/0438/0291/9074/files/lilikadepotiroboxinotubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/deginemodotanevisoju.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/futajizexovujugera.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/5695807560.pdf
    • https://cdn.shopify.com/s/files/1/0432/6755/5481/files/nuveporobilalatujepevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/loxobamarunofogomatanis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/24238598059.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5880/files/analog_circuits_basics.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_off00007d17.bin
ecd5aaa1f5da3e162e4d17cdaafa3e6484669c7381b041da77e6d8f9014489de
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D17 5912 bytes
font_01_sfnt_off00009043.bin
837d7d07f4561dd01f41b7a4768fbd4bde352ce18c1e161c7cf8f2a78ef584c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9043 13432 bytes