Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdaa574130ad9e7d…

MALICIOUS

PDF

67.0 KB Created: 2020-08-11 02:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 967ab27864c255e5c80e6952c903fc26 SHA-1: 599b63bd515f1620e1161f41fd89c6f0b5f3830a SHA-256: bdaa574130ad9e7dd5fa355e6092a5623a7be70523798d68891f4693ee73bde5
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, with the primary malicious URL being https://ttraff.cc/pify. The document body contains garbled text but includes the same malicious URL, suggesting the document's purpose is to lure users to this redirector. No scripts were extracted from this sample.

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.cc/pify?keyword=substitution+method+integration+pdf
    • http://files.brightlikeblack.com/uploads/1/3/1/0/131071019/ac9aceb33.pdf
    • http://files.biotechashok.com/uploads/1/3/0/7/130775484/5132416.pdf
    • http://files.sharpiepresents.com/uploads/1/3/1/3/131381006/zipojefalipimi.pdf
    • https://cdn.shopify.com/s/files/1/0448/3697/8849/files/kingdom_animalia_phylum.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/5959693528.pdf
    • https://cdn.shopify.com/s/files/1/0436/5022/0185/files/arriba_6th_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/65775651417.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/22168435089.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/jadobabuseku.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/lulaxolemen.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/mopexoxoxekekowav.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/free_download_surat_yasin_dan_tahlil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/senidadozawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/deredoniwevonojodovefa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/integral_calculus_for_dummies.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a499.bin
dbe53db9ddbae03afafd736678e182e0d49e137a2ec115774748f14266f3a969
pdf-font-stream PDF embedded font (sfnt) at offset 0xA499 5668 bytes
font_01_sfnt_off0000b79e.bin
fa06222deae10a07a9f0656a806cb7ea4efd59e8a9df81523cc7e8e60de14de4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB79E 16180 bytes
font_02_sfnt_off0000ea00.bin
fe9571d28fae7a61d971a76d6a96357abdaf1bd28a19be60b9745fe6aa3ab5b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA00 16060 bytes