Malicious PDF — malware analysis report

Static analysis result for SHA-256 98509724c49bd47e…

MALICIOUS

PDF

45.1 KB Created: 2020-08-29 21:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99cee87b835eee64ccd1296fb92438bb SHA-1: d632da7011d3db6090667c07595ec64a27914d0e SHA-256: 98509724c49bd47e94945cdf81f754e9986c9a28036321bbf7a3c02a1bef0ca5
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a critical heuristic due to its inclusion of links to known malicious redirector infrastructure. It also contains a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is https://ttraff.me/wix?keyword=tomar+cha+manasul+diet, which is likely the initial lure.

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.me/wix?keyword=tomar+cha+manasul+diet
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/23786421683.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/kubaxigemosemedititawi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/32304592555.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1703/files/commercial_rent_contract_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/25596139972.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/basic_excel_test_for_interview.pdf
    • https://cdn.shopify.com/s/files/1/0438/2618/4352/files/57637222870.pdf
    • https://cdn.shopify.com/s/files/1/0428/8600/4899/files/1er_rgiment_de_fusiliers_marins_1914.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/ankle_dorsiflexion_manual_muscle_testing.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/vaxexok.pdf
    • https://static.usrfiles.com/ugd/b8c837_0992f025c53541fca04e5c472a853b50.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_166ca9342a49483ea42d518e8ab2aa95.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d928d30a28b4f8c87529791b03cfff4.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_off00007330.bin
eb5b985c62ad8762ff02e6d2c36d8bf43488109024e855e0b4a18ba7dc2bf63f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7330 5128 bytes
font_01_sfnt_off0000846d.bin
65df7bdd9dd418e8a57bde9a80f7b6d4d2e736e44f9c8940d6b604ea67afadc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846D 10508 bytes

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