Malicious PDF — malware analysis report

Static analysis result for SHA-256 c674f99211e3b74d…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 22:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f1cc8b1cbaea2ab55973aa6e0267afd SHA-1: 761d6725e21cd6947222848f9f7d6e8719afd83c SHA-256: c674f99211e3b74d0df00ea3d480fcb756d7687836853e0c9f9ec9c32b23ab02
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 benign Shopify domains, but one critical link redirects to known malicious infrastructure at 'ttraff.ru'. This suggests a link farm or redirection tactic to obscure the final malicious destination. The document body, though partially corrupted, contains the text 'Biomagnetismo medico rastreo pdf' and the URL 'https://ttraff.ru/pify?keyword=biomagnetismo+medico+rastreo+pdf', indicating a lure related to medical biomagnetism. The primary malicious URL identified is https://ttraff.ru/pify?keyword=biomagnetismo+medico+rastreo+pdf.

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=biomagnetismo+medico+rastreo+pdf
    • http://files.tfcweldcounty.com/uploads/1/3/2/6/132695741/vexulozukasuf.pdf
    • http://files.lotusbloomfamily.org/uploads/1/3/0/7/130775249/jisofevemes-saweseraxetusu-beginan-lejevez.pdf
    • http://xawive.fredoniaenactus.org/uploads/1/3/2/6/132695742/55fde15200181d.pdf
    • http://files.bckmphnz.com/uploads/1/3/1/3/131379356/a1bb2cf05c9.pdf
    • http://kikeka.larnemusicfestival.com/uploads/1/3/0/7/130776031/86a238c9a350f.pdf
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/facilitator_guide_akpsi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1489/6290/files/9529195909.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/58819311651.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/54603287712.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/pdf_to_word_converter_online_free_without_mail.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/baking_biscuits_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/1425715490.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/vemenowumafekejab.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/24478965434.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/81300497789.pdf
    • https://cdn.shopify.com/s/files/1/0428/4612/6247/files/free_online_converter_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/9919889828.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/19248962482.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_off000061a8.bin
c96d28720a1e9d59fcdebaf459ba80210e62887119287833c2fae90438b709c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A8 5280 bytes
font_01_sfnt_off00007373.bin
23de9d5161711fc56ef0abc1180db395e0c57e61ac6f19782f5ed7033e21866c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7373 9612 bytes
font_02_sfnt_off00009451.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9451 4324 bytes