Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5609254c23e97a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-26 17:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df8f1d0d66ac81d64e3b9c7908c25f7e SHA-1: 3b71254660ba8c27fd3d3e49dbce203364a8900e SHA-256: fc5609254c23e97a971a7c2a267666969f24418b6b250a0c1eaa213ad8450ee6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and a title related to 'how to finish edges of single layer', suggesting a lure. The presence of numerous links to Shopify-hosted PDFs, while many are benign, indicates a link farm technique to potentially obscure the malicious destination.

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.link/pify?keyword=how+to+finish+edges+of+single+layer
    • http://disafe.giseleharrison.com/uploads/1/3/2/6/132680869/1856417.pdf
    • http://bitizebuw.aaronjarden.com/uploads/1/3/1/1/131164392/buzegoxi-toledobanavuka-kopara-dogunegupe.pdf
    • http://files.elainethelibrarian.com/uploads/1/3/2/7/132740580/9010817.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9606/files/darrell_sheets_height_weight.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/gubaki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0433/4963/9327/files/australian_passport_application_child.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/sentiero_degli_dei_mappa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8960/6294/files/tunok.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/sir_arthur_conan_doyle_books_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0439/4608/2472/files/xidoxisuzugax.pdf
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/74032686966.pdf
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/4783776487.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2503/files/49674408093.pdf
    • https://cdn.shopify.com/s/files/1/0462/5367/0554/files/driver_notebook_asus_s200e.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/81820688593.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5162/files/nutricion_parenteral_en_neonatos_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/67246075515.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_off00006f58.bin
efa3918506237d99bb58d0f2ca1e636ee38cf4561f2af9d69eb7ac64e46a1cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F58 5324 bytes
font_01_sfnt_off00008183.bin
d1bacdc71ed251930227f7ebe3157fecd1d33022abc7188a50a1a923b3497e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8183 10488 bytes

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