Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f68e181c4bac59…

MALICIOUS

PDF

53.5 KB Created: 2020-08-22 03:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beef7430b03d476f543a6a97781ce8b3 SHA-1: b41f91d422d115a9cd9933f95df12771c2ff11f3 SHA-256: d4f68e181c4bac5959513bc330a11115f71233b8a2610470c96c1376bd5b9a23
200 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a social engineering attempt to trick users into visiting harmful sites. The document body and heuristics suggest a lure for a browser extension or update, and the presence of a password-protected archive hint at a multi-stage attack. The primary malicious URL is ttraff.cc, which redirects based on keywords like 'antivirus free cnet'.

Heuristics 5

  • 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.
  • 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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=antivirus+free++cnet
    • http://files.metal-craft-supplies.com/uploads/1/3/0/9/130969597/tijibavugujeliwag.pdf
    • http://files.lavendershop.org/uploads/1/3/1/4/131483138/sorisi_monone_jelux_xupivoweven.pdf
    • http://files.conniehurst.com/uploads/1/3/1/0/131070309/jelawofulun-fedepamefenupej.pdf
    • http://files.ptsdveteranswife.com/uploads/1/3/1/4/131407968/8701151.pdf
    • http://files.healthgeography.org/uploads/1/3/0/7/130776158/3254967.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/biwuxoguwin.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/bobilunekiraxuzos.pdf
    • https://cdn.shopify.com/s/files/1/0434/1615/8359/files/xajerosafole.pdf
    • https://cdn.shopify.com/s/files/1/0431/9844/7778/files/pregnancy_low_back_pain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/is_besides_a_formal_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/mazosonopozamo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/39653583922.pdf
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/letexoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/lovixigamabute.pdf
    • https://cdn.shopify.com/s/files/1/0428/4658/4999/files/interview_questions_and_answers_for_government_jobs.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_off00009732.bin
77eb4cff9ce02687f3d63a96ba8c13864088c4f50fd35532954554e5b96fa1ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x9732 4680 bytes
font_01_sfnt_off0000a730.bin
a48b7986c2eb805d2e8f58381da167fad4e3b294a57c055a0f9ea58b264c4382
pdf-font-stream PDF embedded font (sfnt) at offset 0xA730 9980 bytes