Malicious PDF — malware analysis report

Static analysis result for SHA-256 515d51aecfba652b…

MALICIOUS

PDF

43.4 KB Created: 2020-08-11 19:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47fc154927cb0862fa3fa2dbce7ed6bd SHA-1: d36f2d65ad3e425f378cb38c25e965e4aa00ea89 SHA-256: 515d51aecfba652bbb44f26d9f0436032199af486e0869e8e46eade9aba1e792
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used for SEO poisoning or to direct users to malicious sites. One of these links, 'https://ttraff.cc/pify?keyword=algoritmi+informatica+pdf', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains some of these URLs, suggesting a lure to external content. 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=algoritmi+informatica+pdf
    • http://lazawigo.cassidysparks.com/uploads/1/3/0/7/130775162/c85dd21f94b30.pdf
    • http://muvot.duffeyphotography.com/uploads/1/3/0/8/130874493/xanupowe-piwufipa-lujiwi.pdf
    • http://lesum.marcchristiankunze.com/uploads/1/3/0/7/130775045/7102199.pdf
    • http://xazekiz.elisamurphyforjudge.com/uploads/1/3/0/7/130775850/gupuzi.pdf
    • https://cdn.shopify.com/s/files/1/0443/7016/5916/files/guia_turismo_bruselas.pdf
    • https://cdn.shopify.com/s/files/1/0438/1124/2144/files/85337047224.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/rupelonibadukig.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/rapidex_english_speaking_course_book_in_urdu_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/bacterias_pdf_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/23357285104.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/70531619950.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/mipanawaviv.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/44895360450.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/dinosepimupezutizaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/28982095806.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0431/5126/1853/files/tazulajoxu.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_off00006b34.bin
2362095e05c244663e9d728c2939cab18a826434b458f68336324efe0524e1b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 5284 bytes
font_01_sfnt_off00007d0b.bin
4b265f8c5cd160d859ebf1e77300977d371d5a14990c356b310989157ff8f6b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0B 10360 bytes

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