Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fcaafa38aa7bc8…

MALICIOUS

PDF

33.3 KB Created: 2020-08-01 01:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c2568496bb9d502ac95376bd2799322 SHA-1: 4e29581b80d69c349a3a89b6a2e9365203ffaecb SHA-256: d3fcaafa38aa7bc89d432227660725579bcb3cf23bbebaa16087f360985c09af
120 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to numerous external PDF files, with one primary link identified as a malicious redirector. The document body, though obfuscated, contains text related to 'erectile dysfunction protocol book', likely a lure to encourage clicks. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site or download further malware. No scripts were extracted from this sample.

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.ru/pify?keyword=erectile+dysfunction+protocol+book
    • http://files.charlesmccarthydigitalphotography.com/uploads/1/3/1/6/131607522/3394347.pdf
    • http://files.justinecandoit.com/uploads/1/3/1/4/131453156/9813528.pdf
    • http://files.premiergoldendoodles.net/uploads/1/3/0/8/130814126/gujow-wanim.pdf
    • http://files.diegogrimaldifx.com/uploads/1/3/1/3/131381605/8536620.pdf
    • http://files.zhiguohe.com/uploads/1/3/1/3/131383384/4301951.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/devedajulojabamifamupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/neretekidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1257/files/76287274036.pdf
    • https://cdn.shopify.com/s/files/1/0437/6884/0341/files/51634083753.pdf
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/naxedajaxelotuzo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/minecraft_creeper_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/19751713382.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/46058814366.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/fekoviwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3896/4903/files/java_hangman_program.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.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_off00004486.bin
2252e804c987bd5b4c7026df4bb2e46a1f09e6c3a7a585b6be71fdf97c31fd51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4486 5204 bytes
font_01_sfnt_off00005655.bin
21228799139967291ad52ec9b18fba6056d4154845090d9c7cb809584fd74348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5655 9568 bytes

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