Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc24d9038269745a…

MALICIOUS

PDF

118.4 KB Created: 2020-08-09 11:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58d32040389f0b7eaccfc938af0e3f3e SHA-1: f91e68fa3f6bd520250fb90e3b0348ff0e3dc53b SHA-256: bc24d9038269745a208b7f56efa579c7ee3fab0b3b0eb56c858967058b9cad61
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure for a genetics textbook, which is then followed by the malicious URL. This suggests the PDF is designed to trick users into clicking the link, leading them to a compromised or malicious site.

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=livro+genetica+medica+thompson+pdf
    • http://files.hoopcubed.com/uploads/1/3/0/7/130775825/veviriw.pdf
    • http://files.heritageelementarypta.org/uploads/1/3/0/9/130969018/mezowoviwebigu-buzajudubisis-jedikunata-mepisa.pdf
    • http://files.poundridgegardenclub.com/uploads/1/3/1/3/131381614/7451319.pdf
    • http://files.thenatureofthecosmos.com/uploads/1/3/0/8/130814460/tabavabarejol.pdf
    • http://files.stonypointfarm.com/uploads/1/3/1/6/131607565/8932355.pdf
    • https://cdn.shopify.com/s/files/1/0433/4013/6601/files/bloodborne_chalice_dungeon_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3512/2081/files/19179099867.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/vixufixudor.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/16510325367.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/12725260017.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/the_nexus_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/2550794251.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/81799077248.pdf
    • https://cdn.shopify.com/s/files/1/0435/7026/6273/files/levefotin.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/lezelogadosikeviwefifuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/jesatekepobiderijovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/dofojujosok.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/5810724703.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_off00018a8f.bin
4db4c754b8aa1b1e9fe6ebc2d2313fa93a2fb8e59618f6c7abba98b5c33a52a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x18A8F 5536 bytes
font_01_sfnt_off00019d4d.bin
507740213d5f5d7101a8b5bc06f96010a4cedd4a20342e1b1c285125a86036c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x19D4D 14500 bytes