Malicious PDF — malware analysis report

Static analysis result for SHA-256 407bf7d0bdfcb51a…

MALICIOUS

PDF

46.0 KB Created: 2020-08-10 17:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58f0949d8d4eec9ef75b21a49e493e28 SHA-1: d91a376796db42564227c4d13f78d9e7f15ab214 SHA-256: 407bf7d0bdfcb51a86f9140ed77d0c6f248917524afcdc5572878429efb40da1
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL embedded in the document body. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure. The document body text, though partially corrupted, suggests a lure related to 'ut calibration procedure pdf'. No scripts were extracted from this sample.

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.ru/pify?keyword=ut+calibration+procedure+pdf
    • http://files.stlcreativelandscapes.com/uploads/1/3/1/0/131070327/f0a8d9bec4a0.pdf
    • http://files.nssupply.com/uploads/1/3/1/4/131454034/paxilita.pdf
    • http://porikejos.bethanyclarephotography.com.au/uploads/1/3/1/3/131383791/2287837.pdf
    • http://files.prydgymnastics.com/uploads/1/3/1/3/131383838/2626253.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/93476337185.pdf
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/55306268887.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/watuxarilav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/hebrew_english_parallel_bible.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/20727223954.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/julaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/bezimelofipigomis.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0714/files/zelurafuxolowu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/rudaledajibasejusiza.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/vivexodolonirifavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3749/9302/files/jutimite.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_off00007681.bin
f93796e2ead381aeffd202bc3de1012814ff2d4a8a37551b932e14a514ab8d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 5104 bytes
font_01_sfnt_off000087d8.bin
2d218b9f386969beefc12f0551f828eccd04973ca7e74a5ed7241c0f82c6ceb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D8 10248 bytes

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