Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d5dfebac24ffc7…

MALICIOUS

PDF

55.1 KB Created: 2020-08-14 11:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3639368f4453504e72576ccaeed0fdd8 SHA-1: 9cf5cb0a62c59aaa5f8d4aeec357451edee526e3 SHA-256: 86d5dfebac24ffc7581124d083f75d39629c16920f0d5d644ef23a2ca03bef7c
208 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and heuristics suggest a lure for an advance-fee scam or a password-protected archive handoff, aiming to trick users into clicking malicious links. The primary malicious URL identified is https://ttraff.ru/wb?keyword=enrollment%20system%20documentation%20thesis%20pdf, which is likely used to redirect the user to a phishing or scam page.

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=enrollment%20system%20documentation%20thesis%20pdf
    • http://files.blueberrygreens.com/uploads/1/3/0/7/130776152/a8ff981093319.pdf
    • http://files.businesswritingmasters.com/uploads/1/3/0/9/130969389/2803208.pdf
    • http://files.keepsantafetxbeautiful.org/uploads/1/3/0/7/130739871/kurenukifi_keluvajilo_valatum.pdf
    • http://files.thompsonsteamer.com/uploads/1/3/2/6/132695569/motokonafanin.pdf
    • http://files.chankinsing.com/uploads/1/3/1/3/131381066/f3aba0cd3edc8f.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/how_to_hack_typing_agent.pdf
    • https://cdn.shopify.com/s/files/1/0440/6378/5112/files/74999537981.pdf
    • https://cdn.shopify.com/s/files/1/0430/7789/4293/files/basozigidojewisupize.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/30230169183.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/51943496595.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/58372564067.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/66359417040.pdf
    • https://cdn.shopify.com/s/files/1/0438/2176/0672/files/86284105948.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/72659704791.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/51886581075.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7345/files/nevelazokom.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/desktop_audio_visualizer.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6822/files/lupepefuzolofugola.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73875000904.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_off00009ab6.bin
9eb6cf777ca3477dd498fa40177731c0805d5762b21243cd092ae2ad147ce082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB6 5452 bytes
font_01_sfnt_off0000ad1a.bin
ba337ff18a79f2783fc49890bf040446ab77ac6d98ebdebca6d3890306193f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1A 9832 bytes

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