Malicious PDF — malware analysis report

Static analysis result for SHA-256 365d41d105011f43…

MALICIOUS

PDF

45.4 KB Created: 2020-08-25 07:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a60dd9c86bf5f82238b087841ef9e67 SHA-1: da6ed855ec8b9605fba32442d88a882888c724ed SHA-256: 365d41d105011f43750b0ca89e641de4e4a7a07128157be1e1d8304e6208a400
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'Printable worksheets for 1st grade sight words' and the malicious URL, suggesting a lure to download further content or malware. The presence of numerous Shopify-hosted PDF links indicates a link farm strategy to improve SEO and distribute malicious content.

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/pify?keyword=printable+worksheets+for+1st+grade+sight+words
    • http://files.campbellspartanssoccer.com/uploads/1/3/0/8/130874205/afbe34a07c0f43.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/30572950971.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/streets_of_laredo_cast.pdf
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/cute_smiling_baby_girl_images.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lokilus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/68576243382.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/mebukopoviwomibuwetilaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/pebinibofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/vazujidej.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/85726023755.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7596/files/35280717053.pdf
    • https://cdn.shopify.com/s/files/1/0430/0062/7363/files/58511787884.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_off00006c87.bin
fe78a36ec585aac1e1c9befcc41293dd4366d8cc9bfa911e38b9f3fa0bc4d0d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C87 5520 bytes
font_01_sfnt_off00007f51.bin
0a4f113f14100703b8ad215ce186e120900a3da90fbe36fe491ccf36955dbb58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F51 12096 bytes

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