Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f51dfdf9e55ffe1…

MALICIOUS

PDF

35.3 KB Created: 2020-08-16 17:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2791b73ccc5f14571526dd7e6283b0db SHA-1: 647603dfe12910a6a9102b645c62acd4e92dc105 SHA-256: 5f51dfdf9e55ffe1504027caa689aa01119247f1431f9906b285b8c0de225fb8
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The document body, though corrupted, contains a URL that is also present in the heuristics and IOCs, pointing to a lure for a 'dna vs rna venn diagram worksheet'. This URL redirects to a malicious domain, likely to download a second-stage payload or phish for credentials.

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/pify?keyword=dna+vs+rna+venn+diagram+worksheet In PDF document text
    • http://files.homesdomains.com/uploads/1/3/1/8/131871488/873ef.pdfIn PDF document text
    • http://mepizon.katherinesclassroom.com/uploads/1/3/0/7/130775436/fanogade.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/1/0429/9682/6273/files/freeswitch_developer_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/15888257262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/32787405758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/12192893801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/94_chevy_1500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/lisezegosasuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6056/3861/files/antrenmanlarla_geometri_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/9166448509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7724/5859/files/70929892564.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 2

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_off00004cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF0 5424 bytes
SHA-256: b867e1d61499d0fd048a2dea417a16fc9398f03363b6b047b4d62a262770ab80
font_01_sfnt_off00005f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4E 9800 bytes
SHA-256: 6629722dfe99a7705f7d7591f0b55dab86939cd07c501cf6b767dce3788cb005

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