Malicious PDF — malware analysis report

Static analysis result for SHA-256 879e51ed852a11cd…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 04:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cfdae2890bc2d122d58fd9a2a09a7bb SHA-1: c64a4f47bce35fb45e1ad29a089ed4900ab87ba2 SHA-256: 879e51ed852a11cd48c31d13fe55d5038068a97db7242daca0fd4e1ecc1d7e1d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirector infrastructure, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text that appears to be a lure for a product manual, combined with the malicious redirector link, indicating a likely phishing attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.com/wb?keyword=bluedio%20t6%20manual%20pdf In PDF document text
    • http://timipes.fpelc.org/uploads/1/3/0/7/130775403/gijinaragi.pdfIn PDF document text
    • http://files.starbrighttherapydogs.org/uploads/1/3/0/8/130874162/zejizuwirixuvul.pdfIn PDF document text
    • http://rawadu.dawnwindphotolyrics.com/uploads/1/3/2/7/132741334/4896862.pdfIn PDF document text
    • http://files.jimtiger.com/uploads/1/3/0/7/130775257/6265507.pdfIn PDF document text
    • http://wojane.circusparkmedicalvillage.org/uploads/1/3/0/8/130814297/zefokek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/xobesiburulefukipeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/ffmpeg_subtitle_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/30258425439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6878/3773/files/23465751871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/56902973558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/moravusezonexeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0899/9074/files/fojeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/60491670554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7121/7572/files/building_control_regulations_1997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4717/2768/files/salusuwebekudar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2147/3691/files/alice_s_adventures_in_wonderland_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7766/4929/files/manipepevidimamolotaka.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 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6964 5116 bytes
SHA-256: f3a6ab6b54b7bb7fa5bee76de6957e9117219e1825c7dd683ce643f35cb990a5
font_01_sfnt_off00007ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB8 10580 bytes
SHA-256: 4dca8f71f5f7427595901ed199b966e5dd64437b244a44cc9c340c6d0b50839b

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