Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd37898abdef68f4…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 21:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7798bb1a62a42197431d03a34d43e3f2 SHA-1: 8cf5704c261283a132f79194d5a698d5253d46fb SHA-256: bd37898abdef68f461d23fcdc134beb5f056abe32aa1e5b0f9310d83d244826c
120 Risk Score

Malware Insights

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

The PDF document contains a link disguised as 'ASVAB math practice questions and answers pdf' which redirects to the malicious domain 'ttraff.com'. This domain is known to host redirector infrastructure. The document also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve search engine ranking for the malicious link.

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=asvab+math+practice+questions+and+answers+pdf
    • http://files.emeraldroomhall.com/uploads/1/3/2/6/132695698/4014ff905b008.pdf
    • http://files.attercliffepharmacydirect.com/uploads/1/3/0/7/130775232/defuwo.pdf
    • http://files.christinepr.co.uk/uploads/1/3/1/3/131380345/bopidetujigexerever.pdf
    • https://cdn.shopify.com/s/files/1/0437/9266/2688/files/12967665182.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/soxik.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/printable_receipt_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/fuzovobit.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5988/files/doxidubarosopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/52961677789.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/arihant_all_in_one_science_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/doduxolutatavosiwupekim.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/dozif.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/panduan_belajar_bahasa_arab.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/pdf_converter_como.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/51581856966.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/building_components.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_off0000729f.bin
ecb4fac47b56237e994f8e6e2681a87daaa3b852d3e682fdd38e4bfd8bd06441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 5768 bytes
font_01_sfnt_off00008628.bin
b3d0558ab900f68c779e9dda86b20aff119db981b74f35a05aeb8c4b97bc541c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8628 10576 bytes

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