Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1c1ba5461ad166…

MALICIOUS

PDF

44.6 KB Created: 2020-08-04 18:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b3d69ca584d058fcc7ace3ef58363ac SHA-1: 9e06ef5603467b94d588874e889d7afbae8faba4 SHA-256: ac1c1ba5461ad1666754aa0f1f45df6100e768fd7bde8ee1bc208b3eaa4ac0cc
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=types+of+communication+networks+in+organizations+pdf, which likely serves as a lure. The document body, though heavily obfuscated, contains references to PDF files and the authoring application, suggesting a document-based delivery mechanism. The presence of numerous external PDF links points to a link farm strategy to distribute malicious content.

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=types+of+communication+networks+in+organizations+pdf
    • http://files.darianterrell.com/uploads/1/3/1/4/131437941/1442669.pdf
    • http://files.willarmstrongart.com/uploads/1/3/1/3/131380596/af94473.pdf
    • http://files.williamsnursery.shop/uploads/1/3/1/6/131606687/sijinavatovamun_lolodomasowunas_negumupifoveg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/71941437889.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/45205783669.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/46495301500.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/mipovaximesikatovibitu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/25615480153.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1039/files/literafuguresonozu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8485/8022/files/segredos_do_alcoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/geological_processes.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/bitezisepewezitizodi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/93103716873.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_off00006d1d.bin
cd9bc125fdca96ff85303b3984a8e6ced02cc50f0f843e1216ae9d40c1403e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1D 5700 bytes
font_01_sfnt_off0000809d.bin
4b95913b4c259b71dc2ec121586da9d8ba6eca943662d8b5053963c3db83daa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809D 10832 bytes

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