Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f937c1ee66d732f…

MALICIOUS

PDF

39.4 KB Created: 2020-09-12 06:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e80e22092bc9c5fbba2afee6ee52994 SHA-1: c6182a4fdf3be34ac06667c33855274a70842e54 SHA-256: 0f937c1ee66d732fba060823fe0bed5c6d51610120f5f4c38883022c18839a65
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'sheet music' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links further indicates a link farm or SEO abuse tactic, likely to obscure the malicious redirector.

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.club/pify?keyword=delilah+tom+jones+sheet+music In PDF document text
    • http://files.artypantsstudiott.com/uploads/1/3/0/7/130775229/wumoze.pdfIn PDF document text
    • http://lasobowa.adyartcenter.com/uploads/1/3/0/7/130740490/2586706.pdfIn PDF document text
    • http://files.soundcityreading.com/uploads/1/3/1/6/131606670/lewomakegapozamili.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://static.usrfiles.com/ugd/d7d6cd_cc2f346c1119499bbc0cfe59d29f5515.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ad2ade_001637517b3c4d33a1f4e61011d20ac3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/031dda_2ff88b930031456881a54530608f060f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de65f7_b92e4719f3cd436d836abb0cedb94146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/cnc_turning_machine_design.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f63f29_8f6cfab21f954f01b549bdb381742479.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_25c13feeb3984f12b9e95bd3a6e0c349.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/739437_669b1de1006540048733c7b586474d77.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

Related samples 4

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_off00004e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2C 4900 bytes
SHA-256: e120604a17b0a8f3b86197367f4ec2a0dcca0d31557d61b0a5bb69d70930bab1
font_01_sfnt_off00005eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB6 10500 bytes
SHA-256: 38bd2bbebfaa1e8891a6ce64494b4832c7969d8162c33e6e17788d32ebf00913
font_02_sfnt_off00008298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8298 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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