Malicious PDF — malware analysis report

Static analysis result for SHA-256 e820b8cce994b545…

MALICIOUS

PDF

81.3 KB Created: 2020-07-30 15:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ef94e9500c28cb224e6e2e0a6b5fa5b SHA-1: c6d74076b34277428713cc41dda6ab4ad13af20b SHA-256: e820b8cce994b545282ac5de1bae66fc424e6617ea94a6983358ef70e4dcf3de
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a redirector service. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that one of the primary URLs leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests that the document is designed to host a large number of external links, likely for SEO manipulation or to distribute malicious content. 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, further supporting the link-based attack vector.

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=introduction+to+seismic+interpretation+hart+pdf
    • http://files.halfmoonyogaandart.com/uploads/1/3/2/6/132695517/8318793.pdf
    • http://files.paoniacherrydays.com/uploads/1/3/1/4/131438667/dcdaf9782a9a9.pdf
    • http://files.benstillsings.com/uploads/1/3/2/3/132303147/a2a5f3fc1.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/39225339280.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/danuxudigedoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/63200258225.pdf
    • https://cdn.shopify.com/s/files/1/0439/3644/8667/files/lageviri.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/xuvenomikanijivaxijunofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/39169314413.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/2997225295.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/bizasezifolisipafibosoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/7086/5052/files/topegevinujegon.pdf
    • https://cdn.shopify.com/s/files/1/0434/9493/2640/files/fujokivulitupuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/kujumusufezukatiwoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/monazodugegiloruve.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/kejep.pdf
    • https://cdn.shopify.com/s/files/1/0435/9634/9602/files/72949943315.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_off0000df51.bin
7ca4980251af0bdd62613550ec9d13418e15ece144a356e90a859ca99677fe68
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 5184 bytes
font_01_sfnt_off0000f0bc.bin
f85105ccbbb58103c71f2c3b4f910067b93eef7c2b8886d846e9630d751af279
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 15792 bytes
font_02_sfnt_off000121bc.bin
ba04679cbc7368f9890885b57c2b0d1aeb6d4f863cf9ecec45405187c742a2cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x121BC 16116 bytes