Malicious PDF — malware analysis report

Static analysis result for SHA-256 43440b14fb8b1d80…

MALICIOUS

PDF

50.8 KB Created: 2020-08-02 05:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bb4f74c11496c9eeec5a02aaeafa467 SHA-1: 04b7990205fb03c9d7e9675fbcf8e4ea8f3e4afa SHA-256: 43440b14fb8b1d800d0a958a7176dcca0cc88cd8389ecf0c77f79977fed2e3ad
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains references to the same redirector URL and a benign-looking Shopify URL, suggesting a lure to malicious content. No scripts were extracted, limiting the analysis to the document structure and embedded links.

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=redstone+flux+1.+7.+10
    • http://files.fpclewisburg.org/uploads/1/3/0/8/130874250/9209f9a1f2.pdf
    • http://files.richardheidenfeldermd.com/uploads/1/3/1/0/131070597/marek.pdf
    • http://files.theeverydaylosers.com/uploads/1/3/1/8/131856627/5836763.pdf
    • http://files.jazzstylez.com/uploads/1/3/0/8/130874143/812480.pdf
    • http://files.lindahugues.com/uploads/1/3/1/6/131606349/bitafo-volatejute-mewaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/penotup.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/fegozisiko.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/80825554026.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/maguxug.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/wifebagatepinebef.pdf
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/bezubujepitizakokamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/15693190813.pdf
    • https://cdn.shopify.com/s/files/1/0428/1958/4166/files/momemefatapugek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/73680976633.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/76139668640.pdf
    • https://cdn.shopify.com/s/files/1/0440/3593/2310/files/game_of_thrones_season_3_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/kunalebudefabopi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/dababesevototolekafubigu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/76634260761.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_off000086f9.bin
2a1d068ae0145329bb7a441d918741a4ba9360a501eb0d74a7df31cbc0b4b95e
pdf-font-stream PDF embedded font (sfnt) at offset 0x86F9 4976 bytes
font_01_sfnt_off0000981c.bin
e654f547343831ce1e6d20d5add93bc77b100ede64d1864f4d9148660785a9f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x981C 10736 bytes