Malicious PDF — malware analysis report

Static analysis result for SHA-256 846ca4ff38f0c1eb…

MALICIOUS

PDF

40.1 KB Created: 2020-08-11 06:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71d22f4631ce39d643006f0c3a842600 SHA-1: c992adb6fba7c97d2b4374fca4b6c646de22589a SHA-256: 846ca4ff38f0c1eb4998a46e20e0ea174a880a7e3be1dc33df8e5f664f4f716f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=school+attendance+management+system+pdf'. This URL is presented within the document body, disguised as a legitimate resource. The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary malicious activity appears to be the redirection to a potentially harmful 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.com/pify?keyword=school+attendance+management+system+pdf
    • http://files.expeditiondance.org/uploads/1/3/1/6/131636969/6492412.pdf
    • http://sukuzew.paulaszzerts.com/uploads/1/3/0/8/130874064/8dd287.pdf
    • http://mebanozef.democraticwealth.com/uploads/1/3/0/8/130873952/8334684.pdf
    • http://files.mybutlerandmaid.com/uploads/1/3/0/9/130969710/kesotiminiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6226/2936/files/72794224373.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/94184752832.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/worugowuxozenudapatuje.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/islamic_names_for_baby_girl_with_urdu_meanings.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/91384966324.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/28690970683.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/brp_installation_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/22337773051.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_off00005dd6.bin
15c7745a2c54780e5eced28ec07612fee06cb7d801ebfcca7c3182a88a5a8a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 5676 bytes
font_01_sfnt_off00007104.bin
927a0724c2b94ee2734ebedee44f71d6cd7e5796ef0b645e3c22e2ef80c5f4ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7104 10196 bytes

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