Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93008c1dddf6630…

MALICIOUS

PDF

50.8 KB Created: 2020-08-08 19:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5870c4fd74e3ee30d560a372d845cc03 SHA-1: a9f2178854e04b0b49e55ee99c1c9d75d75eb522 SHA-256: a93008c1dddf66307f0dea52840c8c7353c69c33e7c093890209500d4c2dbf94
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at `ttraff.ru`. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious infrastructure. The document body is heavily obfuscated and contains metadata indicating it was generated by `wkhtmltopdf`, a tool often used to create PDFs from web 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=aura+libro+javier+ruescas+pdf
    • http://files.sitesbydane.com/uploads/1/3/1/6/131636978/xirilamixev.pdf
    • http://files.theroundhousefarm.com/uploads/1/3/1/4/131437636/zobuwex.pdf
    • http://files.marysclosetco.com/uploads/1/3/1/3/131379406/61b736.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44368867506.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/jofog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/maleboxazukaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/5424/1694/files/adhesive_otitis_media.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/engineering_design_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/cfa_level_1_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/what_is_the_chilton_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/39124378492.pdf
    • https://cdn.shopify.com/s/files/1/0435/9510/4424/files/zebiraroxinal.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062f3.bin
da8a2a9e95f18accac5558c7b0590ca079186f67817695041ffc0ef4cda57620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F3 5112 bytes
font_01_sfnt_off00007468.bin
2a2c776cd73e83852a25c3413b7f408e793205498b772ae09be2cd0e0eb2bc91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 11476 bytes
font_02_sfnt_off00009a01.bin
97e80cc61ebbc6fe4ed03ffd5a5ae1d184ef07adb4204580ef84f3eb02720edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A01 16108 bytes
font_03_sfnt_off0000aeae.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAE 4324 bytes

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