Malicious PDF — malware analysis report

Static analysis result for SHA-256 443d2575186422d3…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 19:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72b0366e436d8e3a6432c950870b8735 SHA-1: 4ec4007760d8f85d15fca401cdf7c6988e8cb556 SHA-256: 443d2575186422d34e4762ebbf8c7e4ec9beff3a1a6f100fa188811f54e72de0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the extracted URLs, 'https://ttraff.ru/pify?keyword=android+root+tool+xda', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to Android rooting tools and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links further supports the SEO link farm heuristic.

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=android+root+tool+xda
    • http://files.batterseamirroremporium.co.uk/uploads/1/3/0/8/130874329/mufepuzoti_wibevebeki_doboforib.pdf
    • http://files.besickchick.com/uploads/1/3/0/8/130873917/puluvozejesetonuka.pdf
    • http://difidapeg.ladyannestrunkomaha.com/uploads/1/3/2/6/132681504/milowovavenig-xemofejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/megujisabekotedaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/astm_a240_17.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2584/files/81483031039.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/weteke.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/cadbury_report_1992.pdf
    • https://cdn.shopify.com/s/files/1/0431/7501/8662/files/87089010643.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7330/files/berixemipiseti.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/zovonolabikozazutul.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/brisbane_city_council_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0611/files/55936134948.pdf
    • https://cdn.shopify.com/s/files/1/0431/9091/1137/files/25270072476.pdf
    • https://cdn.shopify.com/s/files/1/0432/4507/6647/files/72564981271.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_off00005fc9.bin
88ca3aaec096d1f78d9111d2189f9d72225f759e0385b12ad8c49b84ba0c121c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 4696 bytes
font_01_sfnt_off00006fca.bin
b53018ce8effed28ec0a62309dec811a45e2bc1b94e4aae9e9854d09e10ade3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCA 10196 bytes

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