Malicious PDF — malware analysis report

Static analysis result for SHA-256 741fe115f0f5beb5…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 03:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b51d4b26602e21a3e5445e374bf675b SHA-1: 39024d47349def12c207cebc1b878d1092819998 SHA-256: 741fe115f0f5beb5d789a091660ff86d0a5e13835bb1f5e6f23e0db544bc6af7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.cc) and a link farm designed for SEO manipulation. The document body, though obfuscated, contains text related to 'tracing sheets' and the malicious redirector URL, suggesting a lure to trick users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=abc+practice+tracing+sheets In PDF document text
    • http://files.yvccolumbiasc.org/uploads/1/3/0/8/130813357/3e1d583.pdfIn PDF document text
    • http://files.jackyuhuazhou.com/uploads/1/3/0/9/130969798/kononok.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/1/0437/8220/9698/files/convert_html_to_using_php.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/rorasisezopiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/zasugazeweget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/gusuvanexugotoguto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/81083927645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13164506765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5372/7394/files/filomewuwogagolugibin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/74199849921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1390/2234/files/35997546811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/36927464496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/74099427541.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 5

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_off00004e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E48 4968 bytes
SHA-256: e7956c6f211d7aeacdba179f755f372ab48d4f2de718be47ac99436566347de7
font_01_sfnt_off00005f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 9992 bytes
SHA-256: 1001331e5466bdc6ea3ad4fe17ffc9dcf3c95be0c2bbc09cdcd6fc318f717bc0
font_02_sfnt_off00008134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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