Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40e9805a1e880d9…

MALICIOUS

PDF

50.1 KB Created: 2020-08-21 04:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8490e397e4c66d6b77efc23bfe5aab47 SHA-1: 7204a68134e82c1ef1c2c3927d0c50ddb2a37b0e SHA-256: f40e9805a1e880d9e19e241e6291c9d2963b61ace6a204eaafabc0f81ad85cd1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, suggesting a broad distribution effort. The document body, though heavily obfuscated, contains the same redirector URL. The 'SE_MFA_LURE' heuristic indicates the intent is likely to harvest credentials or abuse multi-factor authentication, consistent with phishing campaigns.

Heuristics 4

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=yo+whatsapp+v8
    • http://files.emilymullikindesign.com/uploads/1/3/1/6/131636766/narisixixe.pdf
    • http://files.drcarriebrennan.com/uploads/1/3/0/7/130739593/5309889.pdf
    • http://files.thegoodlifebloggers.co.uk/uploads/1/3/0/8/130813461/rizaranopule.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/39466697209.pdf
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/cookie_clicker_debug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/96992056188.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/51156932819.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/760685962.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/sagir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/hr_assistant_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/hamstrings_strengthening_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/9595/6386/files/39954234205.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/dowugovutepevowotodoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6080/5280/files/work_instructions_document_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/harry_potter_books_free_download.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087fc.bin
c4770e37c7e936fb6f5ba9423d33bc28d3c43a3f1d1eb809ccd893faa8e41e4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x87FC 5084 bytes
font_01_sfnt_off00009961.bin
f128e458d0208f54ddc0d576a55792c2a460b634263244a3d03c5c66bd7b3925
pdf-font-stream PDF embedded font (sfnt) at offset 0x9961 10060 bytes