Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb1d280bb88c617…

MALICIOUS

PDF

39.9 KB Created: 2020-08-13 00:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85ab959f0e069a65cca6a8259b2a54d0 SHA-1: 56daedb95881b4b045133a218641f0161a0125a0 SHA-256: 1cb1d280bb88c61744e3bfb13852ed0bc078fb4ea70ea49b4d0802acea5bcbe6
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Pearson algebra 2 common core online textbook pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of multiple Shopify links, while some are benign, contributes to a link farm strategy to obscure the primary malicious destination.

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=pearson+algebra+2+common+core+online+textbook+pdf
    • http://sapimis.coffeecartomancy.com/uploads/1/3/2/3/132303374/kesevizuten.pdf
    • http://dirimita.nationalroadchurchofchrist.org/uploads/1/3/0/9/130969329/b3b37c6b7e6acb.pdf
    • http://files.bch-marketing.com/uploads/1/3/0/7/130739633/f7dfb1e7b2c.pdf
    • http://files.zamecoproducts.com/uploads/1/3/1/8/131859261/1640847.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/retencion_restos_placentarios.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/vanev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1365/files/sql_greater_than_date.pdf
    • https://cdn.shopify.com/s/files/1/0435/2845/4298/files/understanding_and_using_english_grammar_4th_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0439/2127/7096/files/ideology_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/60654968712.pdf
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/mafipijoboza.pdf
    • https://cdn.shopify.com/s/files/1/0444/6945/2967/files/quanki_opt_out.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/6041871159.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/23474898697.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1170/files/xumogepid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/wokunofonawomifeji.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_off00005af0.bin
5fc00d9e9c942b548a3e862e4544a9d5f839b411cd9c03a39b26b14bffc4e24a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF0 5880 bytes
font_01_sfnt_off00006ee0.bin
41ea9a02273eea1f54d777ad63c3dff13f8e82988e3d8ce5331cb799ec990c08
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE0 10256 bytes