Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66f2147e604fd6d…

MALICIOUS

PDF

43.7 KB Created: 2020-08-23 13:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7c74513bbd99043abd54882d2297c6e SHA-1: 706a7051c9e8b63be5d187a6e0555ecf647e6882 SHA-256: b66f2147e604fd6d458845febb74646ac6f33925971ae30316adf4d26b3b8391
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Spring boot thymeleaf email template example' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a PDF link farm further indicates a malicious intent to drive traffic to external resources.

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=spring+boot+thymeleaf+email+template+example
    • http://files.fightroom.org/uploads/1/3/0/7/130776739/ziloderojibotox.pdf
    • http://files.subtek-music.com/uploads/1/3/1/4/131438018/e673f6cf505.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/tudexomaluvexufitaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/gapawawase.pdf
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/83243533351.pdf
    • https://cdn.shopify.com/s/files/1/0448/1178/0257/files/funky_town_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/18394457262.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/kajojowogadazawevuxas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/whatsapp_for_nokia_asha_205.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/bollywood_all_film_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/dansai_bunri_no_crime_edge.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/acidosis_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/blue_sky_white_stars.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_off00005e78.bin
60eebf6e4b2d34a337acbe77fec6c4771d5d0bc788473b23f0dd237e34f09815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E78 5336 bytes
font_01_sfnt_off00007078.bin
c527bc3f4dfd9789e33ebe80922a712d146a7dfb885e06996473af8fb42e78d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7078 10352 bytes
font_02_sfnt_off000093d7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D7 4324 bytes

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