Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e75e96e81f576a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-07 10:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6941dd290e58bd8da26f4ae9a14f203e SHA-1: 602b43858a868a06f53bbfbaf0e4c9cb97fb42aa SHA-256: c1e75e96e81f576adace77ae6c325e987368c4f98561035974947ebebcd021bb
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary link, 'https://ttraff.com/pify?keyword=history+of+corpus+linguistics+pdf', is likely intended to lead the user to a malicious site under the guise of providing a PDF. Another link points to a Shopify domain, which is also suspicious in this context. The document body itself is heavily obfuscated but contains the primary malicious URL.

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.com/pify?keyword=history+of+corpus+linguistics+pdf
    • http://files.sethharrislaw.com/uploads/1/3/2/7/132712185/nalerufupej.pdf
    • http://files.kathrynfree.com/uploads/1/3/0/9/130969700/083a3897.pdf
    • http://files.localmagazinegroup.com/uploads/1/3/0/7/130775828/wezawasudulagevet.pdf
    • http://files.amyplouff.com/uploads/1/3/0/7/130740255/vupopubupofuni_tagerewom_webedojos.pdf
    • https://cdn.shopify.com/s/files/1/0438/5095/6960/files/winchester_1897_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95181885481.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/labepidapemelobofig.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/barebomubipuvirulafalep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46496449222.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6774/files/medicinal_chemistry_drive.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/50125571530.pdf
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/zidavuxumanera.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/64157293831.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.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_off00006b29.bin
3ee504d1b1b03d202b8be8cc4c3d3788e229b4dd4404d6029f7150b9de9b4eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B29 5176 bytes
font_01_sfnt_off00007ce1.bin
dad9e0a0320c4e3a5bb7092aad064ce352038dcc63765b5e1b971917463f1d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE1 10008 bytes

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