Malicious PDF — malware analysis report

Static analysis result for SHA-256 4272845f84b3d854…

MALICIOUS

PDF

42.8 KB Created: 2020-09-02 03:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b1adf8ca81da8d69df8417403cebb36 SHA-1: 63177299bf0064e2f371d0d18a0f9ed4be051f59 SHA-256: 4272845f84b3d8547483fba4ffbbcbe45a2b8259f652f195cd6afb7fdb304e3d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/wix?keyword=quadratic+equations+problems+and+answers+pdf'. This URL is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to the redirector URL and numerous Shopify-hosted PDF links, suggesting a link farm or content-luring tactic. The primary intent appears to be redirecting the user to malicious infrastructure.

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.cc/wix?keyword=quadratic+equations+problems+and+answers+pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/68439583581.pdf
    • https://cdn.shopify.com/s/files/1/0447/1151/0170/files/dirosokaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/66333758336.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81397135942.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/61245689014.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/zojezidopobud.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/carsales._com_limited_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/57193647685.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/business_writing_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/1077534511.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/mortal_kombat_snes_moves.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/2522383240.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gatafuruzakelimosileraji.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/lixozapijupikokobiwug.pdf
    • https://cdn.shopify.com/s/files/1/0435/4156/1503/files/53388883702.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5276/files/46352963661.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_off0000603e.bin
849818b1a075f10261b9eee8f71fe25463949314a2721120a9f7a6ea512a268e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 5720 bytes
font_01_sfnt_off000073aa.bin
5f35f12f15b655385523f80ba508fe1c931864b9e0844885992621c4a7dfac52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AA 13404 bytes

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