Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a7ce8aaff8d03c…

MALICIOUS

PDF

68.3 KB Created: 2020-09-19 00:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c6de36b860b2388180f8b3e59cfe6e2 SHA-1: 829332b74481bb5a46f7ff56e6279920fcb05d51 SHA-256: 85a7ce8aaff8d03c421123f3ba8a9eb8ff1d98fb40890ddde103816693bae291
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a link to known malicious redirector infrastructure. Additionally, it contains a PDF link farm, indicating a potential SEO poisoning or phishing campaign. The document body, though heavily obfuscated, contains URLs that are also listed in the heuristics, reinforcing the malicious intent. The primary attack pattern involves directing users to external, potentially harmful, web content.

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.me/wix?keyword=stiff+records+if+it+ain%2527t+stiff
    • http://wowakew.drginamaffia.com/uploads/1/3/0/7/130776349/3984671.pdf
    • http://panano.thomasaquinasbaltimore.org/uploads/1/3/1/3/131398225/xekuzejo.pdf
    • http://files.sandrawadkin.com/uploads/1/3/1/6/131606346/supeluveze.pdf
    • https://06d63985-295d-414c-8dd1-39311423ad7a.filesusr.com/ugd/724bd4_21328cfa88854e92b2669f450383a8ce.pdf?index=true
    • https://f972a361-8678-4688-b917-fab424ca380d.filesusr.com/ugd/585b1d_7009f8865f5c41b0875a3e530cce847d.pdf?index=true
    • https://dc0a8cc7-4bf5-4ac0-94ad-5e5353530cef.filesusr.com/ugd/ee4a13_98be46ed42b6428e92d87fa1e4de23a4.pdf?index=true
    • https://6f3d24f1-e2f3-4bd3-8f34-9a6a3c5ab13e.filesusr.com/ugd/8a9bcc_c7ce37dd1bc84a0abc213e387f9d443d.pdf?index=true
    • https://edfbefbb-ad6d-4238-a58c-6a3ac08556f3.filesusr.com/ugd/576447_048e0a51f2dc4e64881cc9d4d967dc3e.pdf?index=true
    • https://f2ef0c0a-e38d-4c28-838d-a4e400813059.filesusr.com/ugd/f34323_1cd4e8e7853847ba80251300de65009f.pdf?index=true
    • https://0f48c2d5-601a-46ba-aadc-c38ad9f3da46.filesusr.com/ugd/cac9e4_410fc2b49e6f4b31ab49ce2f8390b2d5.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/bojidagugaviramajufaxebij.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/58748231695.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/7689817550.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/sipopugexopezegajewav.pdf
    • https://cdn.shopify.com/s/files/1/0485/1987/2674/files/rogue_soul_3_unblocked_66.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_off0000a95b.bin
9f83c5f83a0407f2d00cce173e5b0f5def16d4162760460ecd009de5efe9a61c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA95B 7888 bytes
font_01_sfnt_off0000c34d.bin
181072271dfddd12576fd1e6e8c348e13bb9729b9b9d196f3ac2aa9698a7aaf2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC34D 5120 bytes
font_02_sfnt_off0000d4cd.bin
8be231ee620358bf91718b3025949833dc2074f02a5527e773be1d9de540cd91
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CD 15276 bytes