Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c5806404a80382…

MALICIOUS

PDF

42.9 KB Created: 2020-09-03 13:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e371b230ed6845fa60eab8decea5cbb SHA-1: 4c54f1fa94935cf7610979d4738885112969e856 SHA-256: f8c5806404a803829dec5b01d7ea9ab998c19e9ac7835513fe258037e496ceae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded links, with one prominent URL leading to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a lure related to an 'air cooler project video'. The presence of a link farm heuristic further indicates an attempt to distribute malicious content.

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=air+cooler+project+video+ing
    • https://cdn.shopify.com/s/files/1/0431/4696/9237/files/3031694033.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/fusujubedip.pdf
    • https://cdn.shopify.com/s/files/1/0439/3749/7243/files/bioshock_rapture.pdf
    • https://static.usrfiles.com/ugd/b8c837_623b77815142466584cc69fe5b4dead3.pdf
    • https://static.usrfiles.com/ugd/913720_431de546cff84e95a7d77bea13be65ba.pdf
    • https://static.usrfiles.com/ugd/353d00_e788014615f34c91975d7c55e944f2f1.pdf
    • https://static.usrfiles.com/ugd/3bca44_22006826616f4cb98588451ea9e235f4.pdf
    • https://static.usrfiles.com/ugd/c75f60_db1bbaaaacc244c9b72ea1359c69ba0a.pdf
    • https://static.usrfiles.com/ugd/5a1791_5ba1d7feb73647369ccd03e952b4ba39.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/20256019830.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/kujunijufejebaziganaberis.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/30690485167.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3846/files/98600670959.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_off00005cc3.bin
02bbe647fb1b0ad7038d1fffc7613e32009314b9bb12f6433ac6c9c654ae0247
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC3 4768 bytes
font_01_sfnt_off00006d03.bin
1165f9a9f8fb2fb9de2cc1d3f7076eb03b7a9cf51cad97a2e60da65886b6e9bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D03 10444 bytes
font_02_sfnt_off000090bf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x90BF 4324 bytes