Malicious PDF — malware analysis report

Static analysis result for SHA-256 2782886678cec935…

MALICIOUS

PDF

47.5 KB Created: 2020-08-04 07:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a89c6d6e198cf4f281957b2aad29e176 SHA-1: fc9e7c1c87aeae8a46d71b62f4e1bb7887499cce SHA-256: 2782886678cec9353070274ffeb0db97170c78635856ea63cca8e9380367332d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented to the user as a 'weekly budgeting worksheets pdf' lure. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The primary malicious URL is 'https://ttraff.com/pify?keyword=weekly+budgeting+worksheets+pdf', which likely serves as the initial entry point for a phishing or malware delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=weekly+budgeting+worksheets+pdf
    • http://files.thymesquareca.com/uploads/1/3/2/6/132695325/7806357.pdf
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdf
    • http://files.remindfulnessapp.com/uploads/1/3/1/0/131071252/mowasirut-zomijolosuf-vojaribajugegip-gefawu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3521/files/73428221652.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/72839333780.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/pixaruzalewegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/pujidox.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/trustpilot_logo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/gagumezexopobodeweninu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/96858843564.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/46000948761.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37638787324.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/37011084808.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/gomizen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/73830705774.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_off0000794c.bin
ab40f156bcfeeb71f0a5d614cf2aa24e1812598199484c59df34d42ca7471b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794C 5504 bytes
font_01_sfnt_off00008c21.bin
75c940cd945634c674719a0bbffd44613ad6a7c7b33aeaef26d3c5ce1e092d4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C21 10804 bytes

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