Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b4b9be793f9c19…

MALICIOUS

PDF

46.7 KB Created: 2020-08-13 02:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c13d5344ce29ef8abaacfc603dda09a8 SHA-1: cf022447ee10c442927753a15d8f89e2ecf0c524 SHA-256: f4b4b9be793f9c19d6392a808834964e5ff954657204c28f7209dd69468b95a4
150 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for containing links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary redirector URL being https://ttraff.com/pify?keyword=abb+ability+pdf. The ML classifier also strongly indicated maliciousness. The document body contains garbled text and embedded URLs, suggesting it is not intended for legitimate user consumption but rather as a vehicle for link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=abb+ability+pdf
    • http://files.houghathleticboosterclub.org/uploads/1/3/1/0/131070851/bimuvovuzatemogum.pdf
    • http://vagesed.souland.org/uploads/1/3/1/3/131383790/dugenuwipuzasa-kevejapok-vijip-lapenine.pdf
    • http://files.flinflonrecycling.org/uploads/1/3/1/8/131856543/328684.pdf
    • http://files.natureswayhealthfoods.com/uploads/1/3/0/7/130739614/dilulenopopukodax.pdf
    • http://files.orbisholding.com/uploads/1/3/2/6/132696335/xezuwenerib-kuvarizupiripu-metepojevuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/97944688549.pdf
    • https://cdn.shopify.com/s/files/1/0432/8449/6550/files/66118911850.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/woladejenusilifuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/agriculture_durable_au_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/xisajelujugiwevuvugefel.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/terrestrial_biomes.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/barron_s_sat_subject_test_chemistry_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/7074/8827/files/31660819097.pdf
    • https://cdn.shopify.com/s/files/1/0449/9944/2590/files/treble_clef_note_names.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/13212669271.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/84792077740.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/caprice_24_partitura_violin.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_off000078f8.bin
ce51a3df0151bb27fa871ae23fa4911782066f63ea070c844b4e1551ce3f9cd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 4992 bytes
font_01_sfnt_off00008a0d.bin
a60b091b25c4c295f82f436f06bf7bfd8bcc4a17e213dfc01786608a60da9b8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0D 10188 bytes