Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc74c1c4e6015093…

MALICIOUS

PDF

38.4 KB Created: 2020-08-08 20:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a5a93c3edbbe6b168d71d55cc777206 SHA-1: 415ec8b3cb122c357f7d15bdad641ee9245b8425 SHA-256: fc74c1c4e601509311ae765a77a32e1fafde82e58f58eb9d2c8966eae02dae80
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=suffix+y+worksheets+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0428/4553/6419/files/goxinerifonudanarajepunap.pdf'. The document body, though heavily obfuscated, contains the text 'Suffix y worksheets pdf' and the malicious URL, suggesting a lure to a malicious site.

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=suffix+y+worksheets+pdf
    • http://nebexozi.emmazang.net/uploads/1/3/2/6/132695569/kizezuw_tilufadu.pdf
    • http://tipok.jangraypianoartstudio.com/uploads/1/3/1/6/131606875/08ab3d9f5e7d38.pdf
    • http://files.jeffdunntrombone.com/uploads/1/3/2/6/132681394/478cca3a11502.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/goxinerifonudanarajepunap.pdf
    • https://cdn.shopify.com/s/files/1/0435/6148/4437/files/convert_string_to_number_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/94107489849.pdf
    • https://cdn.shopify.com/s/files/1/0433/2306/4488/files/10542438601.pdf
    • https://cdn.shopify.com/s/files/1/0444/5034/9223/files/atkins_quimica_inorganica_4_ed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sakumuxapiwitisozu.pdf
    • https://cdn.shopify.com/s/files/1/0447/7979/8679/files/arcmap_10._6_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/92036787649.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/44787603825.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/black_demon_task_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/vezuronasowijidorodape.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/70

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005948.bin
66b73c0f3e9b81c8f3e26b2802a85f5367733135566bdb4229772d09e76a1b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5948 5316 bytes
font_01_sfnt_off00006b80.bin
3f8c66f2d1f5c76a7bcc9b1b25f63c0b01916a7aff2cf92f4db2445644c7828c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B80 9704 bytes

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