Malicious PDF — malware analysis report

Static analysis result for SHA-256 568c5625fc869334…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 15:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a892e051994c72b75e13a7ca762c08dc SHA-1: 953c078458be1ebd64c5e681d9f2139071608da8 SHA-256: 568c5625fc869334b65087f79c7ba21f2eb1eb010567120d7c3db0cd3e3462d3
150 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=reasoning+ability+solving+tricks+pdf'. The document body, though heavily obfuscated, contains text fragments that appear to be related to the lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the PDF structure itself does not indicate specific exploit techniques beyond redirection.

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.com/pify?keyword=reasoning+ability+solving+tricks+pdf
    • http://files.appletreecontractors.com/uploads/1/3/1/6/131607712/9709263.pdf
    • http://files.jordanjharrison.com/uploads/1/3/1/6/131636676/8eb4764eb25.pdf
    • http://tazet.troop76losaltos.org/uploads/1/3/1/3/131379578/9198080.pdf
    • https://cdn.shopify.com/s/files/1/0435/4670/6088/files/xusuzifaluwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/31796826653.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/44329583999.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/divulofuzasosukamadifen.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6212/files/jasuzefezonafutomukapusaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/pidafodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/butawaludevupazidizibe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/53787280735.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/disha_publication_child_development_and_pedagogy.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/79818708349.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/kerinimebigowobozozapiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/31729920534.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/gufevomumuruvar.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_off0000672c.bin
d90b56c1971953387ad262e2d85fbe2b6750bd0d7413a3b8918e107204350081
pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 5696 bytes
font_01_sfnt_off00007ab8.bin
2e9ff967b485507c051a11ad8751f3e850acbf12f0a0b40ba33062212a0169f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB8 10208 bytes