Malicious PDF — malware analysis report

Static analysis result for SHA-256 366bedd4a8c9c8a3…

MALICIOUS

PDF

44.1 KB Created: 2020-08-08 16:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa467ba5df463c8ff7672f9b689bd41c SHA-1: 74df0d9b1c70e9037902830c6363d2eeebf9f0a0 SHA-256: 366bedd4a8c9c8a3f032f9258da4c45548c390c6060f92e34be4990582d47056
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. Another heuristic flags a link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be the distribution of numerous links, potentially for SEO spam or to lead users to malicious content, rather than direct exploitation within the PDF itself.

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=armiger+warglaive+datasheet+pdf In PDF document text
    • http://files.spjgt.com/uploads/1/3/2/6/132682868/2b95e1635efb4b0.pdfIn PDF document text
    • http://files.pcpachicago.com/uploads/1/3/1/4/131454172/givusujabopekexaga.pdfIn PDF document text
    • http://davosugef.circleofsage.com/uploads/1/3/1/4/131406082/4475912.pdfIn PDF document text
    • http://zolibu.businessprocessassurance.com/uploads/1/3/1/6/131637136/9083499.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/1/0434/6016/5797/files/41925776759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/zuzuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/76980807689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2337/6277/files/faperevukujum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5528/3350/files/23718843432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3529/9738/files/jakedeluroxutanubat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/womuwabojoxogupizujed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/719518043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/negritude_in_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/base64_decode_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4679/files/krishna_yajur_veda_in_kannada.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_off00006b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7F 5596 bytes
SHA-256: 030aa87f6d53930e7b9fc164d22ce604e325dc9e50f0ba1c469245f340493f35
font_01_sfnt_off00007e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E74 11060 bytes
SHA-256: 30560bf720d0fa38f9e539f6e39e21c9078c1d36d3ac364f6ac1342778cc5563

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