Malicious PDF — malware analysis report

Static analysis result for SHA-256 c489b5ee10759dbd…

MALICIOUS

PDF

77.1 KB Created: 2020-08-08 04:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 018e7b4a02aacc378fdb4c8caf7b4ba9 SHA-1: 32498e05ed66e1e2b1f62e3163261a74eaf8cdfe SHA-256: c489b5ee10759dbd2a4b82528e5f64a3dde93e001c8a5ff7774c62aa8c7b9b1c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also present in the document body. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains. The primary malicious link is designed to appear as a 'bodyweight workout for beginners pdf', indicating a social engineering lure.

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.ru/pify?keyword=bodyweight+workout+for+beginners+pdf
    • http://files.haptotherapiekoningsweg.nl/uploads/1/3/0/7/130738850/falotiver-joruxapobegum-gunixodow.pdf
    • http://files.brucedelfosse.com/uploads/1/3/0/7/130775772/1bf557b.pdf
    • http://files.nicolechristina.com/uploads/1/3/1/4/131453969/jaxofiligorexugobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1620/9059/files/dapipufonevemuweva.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/6724998483.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/didevebipuzumasutaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/givopamaxus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8516/0857/files/sakakajojerelonaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1591/files/80183213033.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8259/files/watermark_remover_free_online_from.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/58913841560.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/fekitur.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/51172392417.pdf
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/larixopovexa.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/
    • https://cdn.shopify.com/s/files/1/043

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b2.bin
de2e979021f877b3a5c46d1d4631c14e39f657d57559b02a3c40378fe6d523de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B2 5508 bytes
font_01_sfnt_off0001038a.bin
985bdf7f914b1ef200d9e0b453b3f938d769f43e50bc7a939eb971a70cb05fcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 10488 bytes

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