Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1a763496de0c15…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 16:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6633e4f30b9cf515fcc34e933f678332 SHA-1: d08a5d75e445ae8be22aa1ac691767caa654fa67 SHA-256: 8a1a763496de0c15f493a6c9df5de8283f7370c95aabfc27b34a30c647859fd3
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, many of which point to a link farm hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=atmosfera+zumthor+pdf', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution, by masquerading as search results.

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=atmosfera+zumthor+pdf
    • http://files.rjandluke.com/uploads/1/3/2/7/132712006/1052145.pdf
    • http://rebol.grapes.global/uploads/1/3/1/6/131637814/4cbe6f.pdf
    • http://files.vernonvtmusic.org/uploads/1/3/1/4/131438567/zaduxaran.pdf
    • http://files.phuketdiveguide.com/uploads/1/3/0/9/130969097/359675.pdf
    • http://files.nooracademychicago.org/uploads/1/3/2/3/132303374/fb947db7e80f.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1109/files/bioenergetics_nicholls_ferguson.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/cosine_rule_missing_sides_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/92696670157.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/81556361596.pdf
    • https://cdn.shopify.com/s/files/1/0463/0675/4717/files/best_android_tv_box_review_australia.pdf
    • https://cdn.shopify.com/s/files/1/0463/4912/3741/files/20542656680.pdf
    • https://cdn.shopify.com/s/files/1/0428/9855/5043/files/majanipomivivijimakowuxet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7231/4789/files/donujonezukodibin.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/kekoxigodigitiwijivov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/weruz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2272/8866/files/82785094796.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_off000060b3.bin
9219b539df42f5adba555e7bc2b10c9be947d92de966481424660dd9c52f2fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 5288 bytes
font_01_sfnt_off00007292.bin
14c4582a46d16945530c7aaa2d5187468ce0153f7844eb1163b292dff1b22b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7292 9908 bytes

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