Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebccff3a15e083e3…

MALICIOUS

PDF

35.6 KB Created: 2020-08-19 10:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cbd0d5b76d93c25b1db1672cf348d6f SHA-1: c7166912e9c5ac308770de30719a94682b99e05b SHA-256: ebccff3a15e083e35302e9190dcce31e6c92ba4cdca4f4a4636a0ceb97f2397e
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=finding+consecutive+integers+worksheet', which is likely used to obscure the final malicious destination. The document body, though partially corrupted, also contains this URL and references to a worksheet, suggesting a social engineering lure to drive traffic 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/pify?keyword=finding+consecutive+integers+worksheet
    • http://files.mobilityfamily.com/uploads/1/3/0/9/130969435/nijabaripem.pdf
    • http://xalurin.tnnme.com/uploads/1/3/2/7/132740478/3836077.pdf
    • https://cdn.shopify.com/s/files/1/0428/8089/3084/files/kakufulasabolugatozezolop.pdf
    • https://cdn.shopify.com/s/files/1/0441/2715/8424/files/wadebewupus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/soxasagoxododexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/75745091495.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/32764168715.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/wefobanuwuwabezobi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/71149496270.pdf
    • https://cdn.shopify.com/s/files/1/0437/5783/0298/files/jagobujozipewarogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8720/files/authorization_letter_sample_to_process_documents.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/20470298207.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5243/files/computer_network_ppt_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/c_o_address_format_usps.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_off00004e1b.bin
ea93a51abedfada945c85fa21ce3d7c658824d58468fb5521ebe2c204818df60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1B 5128 bytes
font_01_sfnt_off00005f9e.bin
4bbade3ceeb044d30f56855b693f5cff28d4c93c5f51e16db25df6d1a1783f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 9920 bytes

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