Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a4d69c599b4333…

MALICIOUS

PDF

40.1 KB Created: 2020-08-03 08:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 827a2536fe7cd4de4958d6b555a6106e SHA-1: 7dd8de4aa62946af33212d32dedcba072708db69 SHA-256: 50a4d69c599b433308005ebe97c3dfe92fc11b993b50e4ea7cf38ba1caa4826e
128 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, masquerading as an Apple receipt. The heuristic firings indicate the PDF is a redirector and part of a link farm, with one critical link pointing to `https://ttraff.com/wb?keyword=fake%20apple%20receipt%20email%20pdf`. The document body, though heavily obfuscated, contains keywords related to receipts and the malicious URL. The presence of numerous PDF links suggests a campaign to distribute malicious content or phish users.

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.
  • 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.com/wb?keyword=fake%20apple%20receipt%20email%20pdf
    • http://files.nashvillenewbieadventures.com/uploads/1/3/0/8/130874350/kifibuzokeralefew.pdf
    • http://files.campconcordia.com/uploads/1/3/2/6/132683459/8965704.pdf
    • http://files.downsyndromejunction.com/uploads/1/3/2/6/132695329/kivosazug.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/voxuritu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4947/4453/files/25562124131.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/pukilozemobarevinevi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/dusutixovisuzewul.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0309/files/zuvesebawilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pizejop.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/14438872983.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8916/files/dynamics_of_flight_etkin.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/aisc_steel_construction_manual_15th_edition.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_off00005deb.bin
cd203d6c18aeb95fb0c06a930184f3851a142f8bff62558da391111ea05dc851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEB 5140 bytes
font_01_sfnt_off00006f5c.bin
9efbb27f169442823ed249fd603e29b9411005496b150cb324c1bafaa40315d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 10716 bytes

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