Malicious PDF — malware analysis report

Static analysis result for SHA-256 d782f9b4a164e76c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-17 07:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7683884e7a3844b1e512cc131b742e70 SHA-1: cba1ff4130b463df781b8cd8238fd03a2765a121 SHA-256: d782f9b4a164e76c287d0f8998ab93bba202abea6374a8243ac85462ab357bb1
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=descargar+appdroid+apk', which is presented as a lure to download an Android application. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and metadata indicating it was generated by wkhtmltopdf.

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=descargar+appdroid+apk
    • http://files.anchorfloral.com/uploads/1/3/2/6/132696171/sewupuzilakeso.pdf
    • http://files.jennscookiecreations.com/uploads/1/3/1/4/131437812/pinisideretanero.pdf
    • https://cdn.shopify.com/s/files/1/0431/9664/5536/files/2015_lexus_es_350_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6853/7497/files/pikijevuxipogeron.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/88088015345.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/empty_d_d_5e_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/pafirivuwajewoximiruwuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3778/files/biohacking_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/61701233899.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6032/files/1991_chevy_s10_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/32960346133.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_off00006452.bin
b14c77939b7df65e95be7c72e46daf13291e065aef26867ba2ec44c8471ed8a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 5272 bytes
font_01_sfnt_off00007653.bin
1a655fc4c59f842a5f95816f2390d8b8f533c98d819d004b6ce33e9ea712abcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7653 14368 bytes

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