Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9ae3b4cb0231eb…

MALICIOUS

PDF

43.2 KB Created: 2020-08-22 02:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 809509b59fff4fa5efd12af9a6d21ebe SHA-1: 2e765effd589812b6ee96fd78be3e44e27e001ab SHA-256: dc9ae3b4cb0231eb04e9a7ff29e1bdad63d144f0b07abfc88573b41f68abe342
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a "consumer reports mattresses 2017 pdf" lure. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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=consumer+reports+mattresses+2017+pdf
    • http://files.oceanpinesmotel.com/uploads/1/3/0/7/130739621/434ee6d28c7b3.pdf
    • http://jonewa.africaep.org/uploads/1/3/1/1/131163725/202499.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/4182142270.pdf
    • https://cdn.shopify.com/s/files/1/0435/3202/6008/files/27284039978.pdf
    • https://cdn.shopify.com/s/files/1/0432/0139/6896/files/mobenirub.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0327/files/el_genero_dramatico.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/71775453169.pdf
    • https://cdn.shopify.com/s/files/1/0430/0875/3827/files/sepimipemapelunep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/ctet_answer_key_paper_1_set_l.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/razagofinarabatafam.pdf
    • https://cdn.shopify.com/s/files/1/0434/6026/4096/files/comment_regrouper_2_fichiers_en_un_seul.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_off000069ea.bin
225b439476e1b53dca4606d0d321282e197b25b9765ec1243e09f4adab03d25b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EA 5468 bytes
font_01_sfnt_off00007c68.bin
115d8aa1fe2221a9b7fbf34dc6f6af046393eb53a8c0057ae4922c9d73f2a7fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C68 10316 bytes

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