Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbfb712bd4d885d…

MALICIOUS

PDF

40.0 KB Created: 2020-08-14 09:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a818a7df177e21b5a86006cb567b6282 SHA-1: 2be41acd73e82a7c7cf4828d24319e8300e6b1a3 SHA-256: 7dbfb712bd4d885d6d7871238e208e330c79fc61b342389a6592f818b8839ddc
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains a URL that mirrors the lure text, indicating an attempt to trick users into clicking through to potentially malicious content. The ML classifier strongly supports the malicious verdict.

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=hoisting%20and%20rigging%20safety%20manual%20construction%20safety%20association%20of%20ontario In PDF document text
    • http://files.firstbaptistnorfolk.org/uploads/1/3/2/6/132681477/6459545.pdfIn PDF document text
    • http://files.lakegeorgelutheran.org/uploads/1/3/0/9/130969352/72850.pdfIn PDF document text
    • http://files.ponderosaspecials.com/uploads/1/3/1/6/131606111/kalex-sojonupoloxi-lizamid-rozukufuxido.pdfIn PDF document text
    • http://wugizus.pumpkincurioushistory.com/uploads/1/3/1/0/131070420/liwapu-dovojazajaril.pdfIn PDF document text
    • http://files.fullcirclecounselling.com.au/uploads/1/3/1/6/131637656/8619365.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/1/0435/3599/0936/files/gimoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8032/files/7071661886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8643/6759/files/82950669934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/motherhood_meanings_practices_and_ideologies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/lijanogurefudelujajuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/heath_ledgers_autopsy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7977/8979/files/35521711252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3599/8880/files/18311290639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3769/5895/files/12815151625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/89879641126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/54402242996.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E64 5284 bytes
SHA-256: ed4670e34be3c7d89e4265e952443d0f65efef89f165a73e0f695845b29582e9
font_01_sfnt_off00006043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 10500 bytes
SHA-256: 3a3e23bef15b69c3510a837a9a61ff5f2ef4749707b7262a6daaec5dca4ed520
font_02_sfnt_off000083eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333