Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a27a2529b1d48d…

MALICIOUS

PDF

64.4 KB Created: 2020-08-09 21:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ec469d2fe9a857aee2f92b3dd774c95 SHA-1: 5f17138eb943524d420a64b9292f68899c3894ef SHA-256: 77a27a2529b1d48ddd71b5dc1852f2f3e4ca730cd0f4175d46b6116b33b81649
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, suggesting a phishing or scam attempt to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=l+anatomie+du+cerveau+humain+pdf In PDF document text
    • http://files.smartnetworksco.com/uploads/1/3/0/7/130739452/dewes.pdfIn PDF document text
    • http://files.bonvivantgourmets.com/uploads/1/3/1/4/131452935/8320689.pdfIn PDF document text
    • http://files.pbguitartuition.com/uploads/1/3/1/1/131164159/9625050.pdfIn PDF document text
    • http://muvod.sundownersadventures.com/uploads/1/3/1/4/131453177/7911003.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/1/0434/1451/9966/files/bemuzapomus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/4962476335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/fetomuvanojani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6025/6159/files/gosevotovorakezuvagopaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/wuwapetide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/1090666931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/bakuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7700/0611/files/89026472014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2527/9648/files/jugaroridorazafotetuzun.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 7

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_off0000b951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB951 5184 bytes
SHA-256: a042b5311cd637baa58e41f443ced23aaed64a5b199885648f324087a89f404a
font_01_sfnt_off0000cada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADA 12848 bytes
SHA-256: e4828c8b25b287c2cfa2be283d4ed5ff62fc5cb2d92ca3fa18905815691a8d91

Open this report in the interactive analyzer, or submit your own file for analysis.