Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15497c53518a037…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 03:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae116c1004da3d6311db9bbbfc05497d SHA-1: f7dd008e7268584caecabb209680ce11ffc1929f SHA-256: c15497c53518a037613fd2326e3c51f8ac0ab3733030bc998fca6da33d9da4e9
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Analogies pdf with answers' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=analogies+pdf+with+answers
    • http://files.lightningridgefarms.com/uploads/1/3/2/7/132710671/9488799.pdf
    • http://sapebaper.wazarahappyshop.com/uploads/1/3/0/8/130874163/ccd94.pdf
    • http://files.jsh401k.com/uploads/1/3/1/4/131438330/ladazedegatogi-numajad-fesafe-lufate.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/jexolabonofikezanejadoga.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/81886165612.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2508/files/63051838294.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/63874947383.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/notadenagefajofakiwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/zebanisenatuwufizunijugas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/dowikovifov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/gigefabodivubidar.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/24377712269.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/65814840081.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/29838096606.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/17759268009.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/25786699977.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_off00006072.bin
2b5067363e75b3503de67ad1eaba3c696db648906bca9d0ce9f76d0fa15975a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6072 5384 bytes
font_01_sfnt_off000072d0.bin
fed037d135ab527823e39af6591dbd0a3156489abf3870d561cdbc3022f9f87b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D0 10488 bytes

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