Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d72031cbc83b2d…

MALICIOUS

PDF

60.2 KB Created: 2020-07-30 17:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dfed858af53f797d130f23335351a36 SHA-1: 030cdd95f0369e93a9eec6a0cb1a5133a9bbcbf8 SHA-256: d4d72031cbc83b2dd6698eaac7f6fff6b8bdb1dc81fbbe126de693f4d98b8cd1
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, many of which point to a redirector service. The document body text, though heavily obfuscated, appears to be related to search terms for 'short stories for grade 2 pdf', suggesting a lure to attract users. The primary malicious link identified is ttraff.ru, which is flagged as a malicious redirector.

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=short+stories+for+grade+2+pdf
    • http://files.mysterytomb.com/uploads/1/3/0/9/130969469/benobun-gojupavolu.pdf
    • http://files.stoneycreekfarmmeats.com/uploads/1/3/2/6/132681479/bowuwutigiroza.pdf
    • http://files.susanmastalsfoundation.org/uploads/1/3/1/3/131383698/6328ca54e9d7866.pdf
    • http://files.mysterytomb.com/uploads/1/3/0/9/130969469/benobun-gojupav
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/fojolen.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/lofimejuwakofifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/55063138869.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/85319349649.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/2893171205.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/84618678115.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87745409623.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/sajajotitunuxekurovelo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6773/files/8539186493.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/nafixerosabitawatitika.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/2613722707.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/82837271485.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_off0000ae88.bin
4c19dc60db72adb2b4264c15908ef44a0e2fa033bc8425c581f087a4cbbd9b9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE88 5188 bytes
font_01_sfnt_off0000c03f.bin
678d1aca75a90fa755defa0705ffb0a49be02785f536f91f66711ee009884cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC03F 10304 bytes

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