Malicious PDF — malware analysis report

Static analysis result for SHA-256 916e1d47e8356419…

MALICIOUS

PDF

43.3 KB Created: 2020-08-28 19:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c6d13bc9236553402a755a2de2fd488 SHA-1: a279ffe171fa077121ab2bf4aff1e5dc3148f926 SHA-256: 916e1d47e83564195bc93de1d0cf73d6eb5e7e2c153b6ec72029ba9174213aac
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to legal demands, suggesting a social engineering lure. The presence of numerous links to Shopify-hosted PDFs, while individually benign, contributes to a link farm pattern. The ML classifier strongly indicated maliciousness.

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=demanda+de+nulidad+de+acto+administr
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/temefomepitupixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5479/2866/files/jizepubadoni.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8823/files/vampire_the_masquerade_camarilla_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/effects_of_air_pollution_on_vegetation.pdf
    • https://cdn.shopify.com/s/files/1/0446/8106/8697/files/busqueda_avanzada.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/84083636007.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3743/files/88433397809.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/raburilefarebojitunin.pdf
    • https://cdn.shopify.com/s/files/1/0439/2402/9608/files/47161650959.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6062/files/materiales_dentales_aplicaciones_clinicas.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab90a2c16934972befaab0793c90418.pdf
    • https://static.usrfiles.com/ugd/b8c837_23a055ba82364faa9aee6e7df11a00e8.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d2b.bin
efea2e923349906cdcb333665e3d10f91398eb4efa4e129919a8e731506c18f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2B 4968 bytes
font_01_sfnt_off00006de9.bin
49fd6fbc95bc5438e9065972d0d67f36677d730aefa05513c8b6a9a7951b159b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE9 11064 bytes
font_02_sfnt_off00009211.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9211 4324 bytes