Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d4b9c8a4a91845…

MALICIOUS

PDF

42.4 KB Created: 2020-08-24 00:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a55b6661c0fb2d5d62e88fa79cb0cbd6 SHA-1: f6ba85f25d7f6752aed725f1017fc712d5e2928a SHA-256: 23d4b9c8a4a91845d41f78452d1da72c04fa4ff1e2d4b7e3e289586182057871
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=cornell+notes+template+on+word', is identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links under the guise of providing a useful template, ultimately leading them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=cornell+notes+template+on+word
    • http://kewobirag.allseasonspr.com/uploads/1/3/0/9/130969723/7200812.pdf
    • http://files.taichischoolofgentleexercise.com/uploads/1/3/1/3/131397934/67f5de.pdf
    • http://vuwomozu.artculturevs.org/uploads/1/3/1/3/131379394/debazemololumobug.pdf
    • http://files.wetravelgeorgia.org/uploads/1/3/0/7/130740625/bipoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/25172673269.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/fetegatigasibobilatipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/java_1._8_0._172.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/73727203909.pdf
    • https://cdn.shopify.com/s/files/1/0433/0553/3598/files/59189848834.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/fozukubumuni.pdf
    • https://cdn.shopify.com/s/files/1/0429/1015/4908/files/xafirufasakubegibut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/kipabuvinulavif.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/doraemon_new_movie_full.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/95916940346.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_off00005d6f.bin
917c363d32f22d359f7a2c93d8fd908937b50e4da8a29dfe24b643d4521df51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6F 4960 bytes
font_01_sfnt_off00006e39.bin
438abd6a028671a5c78fe147083c90a14cfa00a5d5096985682d53edc1682658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 9564 bytes
font_02_sfnt_off00008ec8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC8 4324 bytes

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