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) First seen: 2026-05-09
MD5: b7c74513bbd99043abd54882d2297c6e SHA-1: 706a7051c9e8b63be5d187a6e0555ecf647e6882 SHA-256: b66f2147e604fd6d458845febb74646ac6f33925971ae30316adf4d26b3b8391
194 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 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 In PDF document text
    • http://files.fightroom.org/uploads/1/3/0/7/130776739/ziloderojibotox.pdfIn PDF document text
    • http://files.subtek-music.com/uploads/1/3/1/4/131438018/e673f6cf505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/tudexomaluvexufitaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/gapawawase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/83243533351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1178/0257/files/funky_town_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/18394457262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/kajojowogadazawevuxas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/whatsapp_for_nokia_asha_205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/bollywood_all_film_video_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/dansai_bunri_no_crime_edge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/acidosis_in_cattle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/blue_sky_white_stars.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: fightroom.org 3 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E78 5336 bytes
SHA-256: 60eebf6e4b2d34a337acbe77fec6c4771d5d0bc788473b23f0dd237e34f09815
font_01_sfnt_off00007078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7078 10352 bytes
SHA-256: c527bc3f4dfd9789e33ebe80922a712d146a7dfb885e06996473af8fb42e78d7
font_02_sfnt_off000093d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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