Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82ae95a8cc42e0a…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 23:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f94a296aa4b83d458c1c4e3bb866f7e SHA-1: 27b5fd0134bfca6eccc0e261611f2e313bb388d4 SHA-256: f82ae95a8cc42e0a1e0bccb6eb9c5853685b44cc41acb5bedec2d68d95c85f9b
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external sites, which is indicative of a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=armature+reaction+and+commutation+in+dc+machines+pdf', suggesting a lure to a potentially malicious site disguised as a technical document. 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.cc/pify?keyword=armature+reaction+and+commutation+in+dc+machines+pdf In PDF document text
    • http://files.800steps.com/uploads/1/3/0/8/130813966/9495548.pdfIn PDF document text
    • http://files.mainstpub.com/uploads/1/3/1/3/131383586/sumaxixo.pdfIn PDF document text
    • http://files.artmatterscommunitystudiogallery.com/uploads/1/3/1/0/131070674/038f8ab324a85d.pdfIn PDF document text
    • http://files.1stdivisionrangers.org/uploads/1/3/1/1/131164027/0e22aeb8811ab02.pdfIn PDF document text
    • http://files.icdlearning.com/uploads/1/3/1/3/131398497/baviralixuvuwo-lumod-sebipoxajata.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/1/0435/9618/5763/files/41527756131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/risomomitipexopewax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/60968492370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/vapovoxofelemorop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/bilivafopaxerovelip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/pojux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/munak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/9842229493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1891/0876/files/georgia_lease_agreement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/fowatelajadajude.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 8

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_off00007234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7234 5352 bytes
SHA-256: c8cf9c8b6fc61792d1afde17091400322cdc3d036252e683e017e256e9f38e0b
font_01_sfnt_off0000843a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 9996 bytes
SHA-256: 7c587cdf0ace405aa97cae12101d356b28e661dfa8bc36b7b48349a4f9f94370

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