Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5f32a88fec29f5…

MALICIOUS

PDF

47.5 KB Created: 2020-08-14 18:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 063c66aa45d5ab2325e2d3d7ccd2ad20 SHA-1: 1b15e5b5e933d0292f890deb4e512844bbf525fe SHA-256: 1d5f32a88fec29f5747f3136573716c2a9b3b38b55c2d26bfcaa1bc4a0cda8b8
128 Risk Score

Malware Insights

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

The PDF contains a prominent call-to-action button and numerous embedded links, characteristic of a phishing or social engineering lure. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which likely serves further malicious content. Another heuristic flagged a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malware. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=five+year+plan+template
    • http://puxugevem.janetahrens.org/uploads/1/3/0/7/130775612/9163af25.pdf
    • http://files.cherylynsalon.com/uploads/1/3/2/7/132740553/8800273.pdf
    • http://files.mintconditioncoinringcrafters.com/uploads/1/3/1/3/131384281/wibosagasitu.pdf
    • http://files.indonesiaagainstaids.org/uploads/1/3/1/4/131453847/xibosogo-witikin-lixesevofejoduw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/bekuvozagupisosijafode.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/jozoxiza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35679391278.pdf
    • https://cdn.shopify.com/s/files/1/0434/5741/3270/files/20182417212.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/63650020720.pdf
    • https://cdn.shopify.com/s/files/1/0436/0192/0157/files/zoxizixufegoloveximuxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/nrsv_catholic_bible_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/picada_de_aranha_marrom_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/beginning_algebra_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.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_off00007200.bin
ee31e8b1058021771a618e7e8f56df6f896d0b484622b65b651747ed77ca6d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 4584 bytes
font_01_sfnt_off00008171.bin
bc25b25bbc73e14921af93a858a47306e6714f36c12615b811d51ee825d5b8ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x8171 10000 bytes
font_02_sfnt_off0000a378.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA378 4324 bytes