Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcd09ad7de529fd…

MALICIOUS

PDF

41.2 KB Created: 2020-08-27 22:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d14986db4ef92b68555fddae42309e7 SHA-1: 05f7bf88a283040d1b29106f0f5b86c712d7380a SHA-256: bbcd09ad7de529fd96c5d9d74bc25f5bc232aeb7ca4f726312d88ba45ef60ecd
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, however, redirects through ttraff.com, a known malicious redirector. The document body contains garbled text but includes the target URL, suggesting a lure to disguise malicious activity as legitimate content. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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=fun%25C3%25A7ao+quadratica+exercicios+resolvidos+passo+a+passo+pdf
    • http://files.cjsprofessionalcleaning.com/uploads/1/3/0/7/130776275/mimumasek.pdf
    • https://cdn.shopify.com/s/files/1/0449/7106/5503/files/ragesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/burnout_paradise_mobile_game.pdf
    • https://cdn.shopify.com/s/files/1/0436/0113/3731/files/fidasisogejejupetifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/properties_of_acetic_acid.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/84064746431.pdf
    • https://cdn.shopify.com/s/files/1/0449/9360/9896/files/hemorrhagic_gastroenteritis_in_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/pawotaxuze.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/43186584564.pdf
    • https://cdn.shopify.com/s/files/1/0463/6691/6763/files/case_information_sheet_denton_county.pdf
    • https://cdn.shopify.com/s/files/1/0432/4140/6631/files/fopowonosup.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_off00005be8.bin
0eb2332f9c6744875e38aefb3bd39bab306a5bf4c9a5c191e45de1d7c74e26e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE8 5540 bytes
font_01_sfnt_off00006e91.bin
3015b23a679da5eb2ef69c51751e54e1fa1b503869bc301f5381b3fdff7b32bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E91 12580 bytes

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