Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a53b2d8dbe15d0…

MALICIOUS

PDF

38.5 KB Created: 2020-08-18 16:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79fd6d0ae3158c62f8c1e91bf9705bc6 SHA-1: af7637ff0aea1f864dd7f481b18a96d1d27de0b1 SHA-256: c5a53b2d8dbe15d0bd66ff1b2b27bd0d8301f76f79e21218b6d93244569d8405
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it contains links to known malicious redirector infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded external PDF links, suggesting a link farm designed to distribute malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=fernandina+beach+pier+surf+report.

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=fernandina+beach+pier+surf+report
    • http://files.ginaandthebean.com/uploads/1/3/1/4/131413040/pasinabarek-nabizefi.pdf
    • http://files.kudoparts.com/uploads/1/3/1/0/131069897/mujikoguja_jikabugekekexiv_ragam_mibino.pdf
    • http://viwuba.a-custom-esl-tutoring.com/uploads/1/3/2/6/132682883/sefekilugex.pdf
    • http://files.mendocinosportsclub.com/uploads/1/3/0/9/130969614/kisijekawili.pdf
    • http://files.sorenacaraudio.com/uploads/1/3/0/8/130814172/8e780759fa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/zutaxutejujutizutuxazujib.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/fugugumug.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/ruviveluke.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/verbe_etre_en_anglais_forme_affirmative_negative_et_interrogative.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7389/files/40071152668.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/menadekeje.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/73620502562.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/jexokiguzijoxoxevot.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/puxufufovigafudul.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5772/files/where_are_the_hosts_files_in_windows.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_off00005916.bin
a5fb7e3d09d08b5eb1bc7be446fd6731d032b247dffab5dee4a9ca126df89300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5916 5304 bytes
font_01_sfnt_off00006b0d.bin
aedf5bc3c4fab1cd5c91df668f3e2a9bfcbfad3f4267b0c960a2c149af92bfe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0D 9920 bytes

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