Malicious PDF — malware analysis report

Static analysis result for SHA-256 2260cc950eda430e…

MALICIOUS

PDF

35.1 KB Created: 2020-08-17 11:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da3b166d286a3facdcbd2bbd4b58f17b SHA-1: ddc0e1762251a723600afc86ad46b2f7530c37e6 SHA-256: 2260cc950eda430ed6872e8ac9fc21ac753776a11acf2268e4c79c54615b08eb
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external PDF files, which is indicative of a link farm or redirection scheme. One of the primary URLs, 'https://ttraff.ru/pify?keyword=bipasha+basu+workout+video+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the document's purpose is to redirect the user to malicious infrastructure.

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/pify?keyword=bipasha+basu+workout+video+free
    • http://kuxuziz.mrtrombetta.com/uploads/1/3/1/8/131857914/64aa5f211.pdf
    • http://files.krownandglory.com/uploads/1/3/0/7/130739686/monobaziwemomone.pdf
    • http://rakal.bonniesminiaturedolls.com/uploads/1/3/0/9/130969368/rurex.pdf
    • http://sozive.psbproservices.com/uploads/1/3/1/3/131378776/jutufufileje.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/introducing_biblical_hebrew.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/27636000841.pdf
    • https://cdn.shopify.com/s/files/1/0436/9396/5466/files/android_tv_apps_development.pdf
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/calisthenic_workout.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/sutadaz.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/48142251785.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/42986921629.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/18522788199.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/87980017502.pdf
    • https://cdn.shopify.com/s/files/1/0440/8374/0822/files/robupizijikejivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/xepinisogadutefaxezoz.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_off00004a0f.bin
d483e65dcea72a76a5744cc66eaa463a5896ce0c44c0332068cf099c9c59fcb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0F 5500 bytes
font_01_sfnt_off00005cc9.bin
9dfe84bfff991fb40bcb828ac88c955d8ba2584702ca5cfbd0fe23ba5c75f7e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 10056 bytes