Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdf436c693fd479…

MALICIOUS

PDF

56.6 KB Created: 2020-07-31 05:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 946c6961f438d50d7b6683069105bd1d SHA-1: f3611e861d32210f6fe32715bb33431ed6059cab SHA-256: 1cdf436c693fd47915e22f0401b4a6a5453e386ee14e48d6acb029271b399e62
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, masquerading as search results for song lyrics. One of the primary links directs to a known malicious redirector, ttraff.ru, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, appears to contain metadata related to wkhtmltopdf and the search query, reinforcing the lure.

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=you+are+the+reason+lyrics+and+chords+pdf
    • http://files.gobandits.net/uploads/1/3/1/4/131408502/fotowujegu_gedeximidududi_natef.pdf
    • http://files.spiritofsaron.com/uploads/1/3/2/6/132682204/ef5fe19b26d.pdf
    • http://files.internationalcancercluster.org/uploads/1/3/0/8/130813100/a03c032.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/pimineripepewofuxedes.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/defewusigorupapomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/veweko.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/batosipa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9915/files/55850461640.pdf
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/feviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/812676728.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/ruwulebudagimibuva.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/vuvijojavazumulatenifot.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/fuguzem.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/zaxipipafafegidiw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008afb.bin
ca68e8c47b8c1e37fc49fb1e261532ba5ebb4ba43d768af6f96b5c14414b6927		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 5188 bytes
font_01_sfnt_off00009c9e.bin
09ab274a985c299d30d632a37504debfa544526ea71456339ebefb13fef62314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9E 10136 bytes
font_02_sfnt_off0000bf71.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF71 16120 bytes

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