Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbd0cdcb8fca6fd…

MALICIOUS

PDF

41.0 KB Created: 2020-09-01 01:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faaf78ad8dbc7120a22b204df4f095b3 SHA-1: 70075b4c399e150f3ba05abdb7d9665fd3d0a500 SHA-256: 4bbd0cdcb8fca6fd246c8bcf51f6ff72219836242c1191d214c016fedf16a259
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector infrastructure at 'ttraff.com'. The document also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDF files. The primary malicious intent appears to be directing users to potentially harmful content via the 'ttraff.com' redirector.

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/wix?keyword=bean+full+movie+1997
    • https://cdn.shopify.com/s/files/1/0445/6002/3711/files/stripe_test_card_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0436/2217/0787/files/kopabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83260340608.pdf
    • https://static.usrfiles.com/ugd/9e53d4_9c2d08614f564304ac3a65538d1c3cf5.pdf
    • https://static.usrfiles.com/ugd/4b7290_ad1c50e3e06a43f38a905f7f63f8bd8b.pdf
    • https://static.usrfiles.com/ugd/0f5b72_6f2cdafcbcf24ed1b9730c951601c4a7.pdf
    • https://static.usrfiles.com/ugd/1be480_eb4b82a259584892b2460eeedccab198.pdf
    • https://static.usrfiles.com/ugd/b50c55_6a4706f167ab464c8919ac963805c537.pdf
    • https://static.usrfiles.com/ugd/3be3a7_052caa73aba84a358cb7e08b8b7b8de6.pdf
    • https://static.usrfiles.com/ugd/b8c837_0eb3a93c1f1a424090ce6f63b8e968f0.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/fedolukafizorisom.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/normalizacion_de_base_de_datos_ejemplos_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.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_off000062c4.bin
95e76686ff7c79091fea13f6594ce90f81393a971d550e23e2720f00dd5eac4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 5036 bytes
font_01_sfnt_off000073f7.bin
62a26730903d8d6dc11894a8b02135c1aaca13e82af0cead59e4515e45c04f1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F7 10432 bytes