Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16dd4aca31d3ef0…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 02:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b9205f220b0264d645e0ad735cf3158 SHA-1: 5cc3925e53c5cacfa196ecce1796989bfd438c30 SHA-256: f16dd4aca31d3ef0f715c2861bab8b387096b422c4d073e5f099938ac9eed440
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file exhibits characteristics of an SEO link farm, embedding a large number of external links, many of which point to Shopify domains hosting other PDFs. One prominent link directs to a known malicious redirector. The document body contains garbled text and references to 'asciidoctor pdf image to embed not found or not readable', suggesting a lure or obfuscation tactic. The primary malicious link is ttraff.ru, which is flagged as a redirector.

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=asciidoctor+pdf+image+to+embed+not+found+or+not+readable
    • http://files.clsportswear.com/uploads/1/3/0/7/130738991/49e61f4077.pdf
    • http://files.wildflowersistersboutique.com/uploads/1/3/0/8/130814297/subonibujuj.pdf
    • http://files.mtzionmbc1.org/uploads/1/3/0/7/130776176/9ac2d.pdf
    • http://files.pragueguidebooks.com/uploads/1/3/2/6/132681632/4e65907699c.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/torutekizosawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/53095078683.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/gumuritekiwabiresofira.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/nufubawimafurozasifoterax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/zuwejol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/15057803422.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/pijadafe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/escala_akin_insuficiencia_renal_aguda.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0298/files/chudy_tata_bohaty_tata_kniha.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2948/files/biwow.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_off000060da.bin
a8c92e66db8b4d6e1bb176de1b08cae900df79a4aab9a08adbfc6476cd516910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 5604 bytes
font_01_sfnt_off000073d1.bin
848c4aedbdb1831cc72d56159450844817faba2c474245bf655c143321cbf185		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 13504 bytes

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