Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff276696e6eefb6b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 01:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1666adc67e9949b265afe66b7303115 SHA-1: 47430c4b2ed43ec1e74fcd5e23d6444d1e86609b SHA-256: ff276696e6eefb6b31cda7b7bdbf14493472351fa04230de12431fb284353194
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a manual for a 'braun millennium series wheelchair lift'. The document body also contains this lure text and the malicious URL. The PDF also hosts a large number of links to other PDFs on Shopify, likely for SEO manipulation to increase visibility of the malicious link.

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/wix?keyword=braun+millennium+series+wheelchair+lift+manual
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/puzenadopa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/termination_agreement_template_singapore.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/48752922447.pdf
    • https://cdn.shopify.com/s/files/1/0436/4120/8992/files/antenna_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0460/3310/9156/files/fogafigafedarirevave.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/54871688713.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/63716715280.pdf
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/dipedeti.pdf
    • https://cdn.shopify.com/s/files/1/0444/6447/2231/files/bsc_computer_science_syllabus_osmania_university.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/dragon_s_dogma_bloody_knuckle.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0835/files/boxer_shorts_sewing_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/74130336564.pdf
    • https://cdn.shopify.com/s/files/1/0447/7786/5367/files/cartesian_method.pdf
    • https://cdn.shopify.com/s/files/1/0459/0433/0906/files/autocad_lt_2013_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0448/0991/2477/files/siva_engine_puzzle_solver.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/41161013267.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_off00006408.bin
d497b49c63a5e5d516562e617eee622daa7baef4fe97f78c3f1bb4f84ce76473
pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 5260 bytes
font_01_sfnt_off000075c6.bin
2cb023e74324a7b67a80682f306a9de47c836dbdc189432467eebdb30b6c8e24
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C6 9472 bytes