Malicious PDF — malware analysis report

Static analysis result for SHA-256 4916ef0d227206f0…

MALICIOUS

PDF

43.7 KB Created: 2020-08-06 17:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d7ada70815304f0152984f20b77d01d9 SHA-1: 63e485a9dc4c3c025262a89f264a12f6aafe4e4a SHA-256: 4916ef0d227206f03e76fab3d16ff3cfd98460b0dc9887910e7af139e79ea1aa
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body text, though partially obfuscated, includes the URL 'https://ttraff.com/pify?keyword=alfabeto+e+numeros+em+ingles+pdf', suggesting a lure to download further malicious content. 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.com/pify?keyword=alfabeto+e+numeros+em+ingles+pdf In PDF document text
    • http://files.homehotyoga.com/uploads/1/3/1/4/131483307/malogunisotugu_zofuwumo_papopuremagefa.pdfIn PDF document text
    • http://files.indianhockeyskills.com/uploads/1/3/0/8/130814717/7919cf.pdfIn PDF document text
    • http://files.ktoart.com/uploads/1/3/1/3/131379877/befixigaxinuwiv_rulazejiraxipo_xifolexorirep.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/1/0427/9717/0847/files/rawez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/vetuwirixarevizet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/79801167018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6443/3566/files/mewetabaditesutuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/volebogesoriso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/81129095347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/53412316543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/zotiwosaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/nokegonelopebufavadomok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6363 5492 bytes
SHA-256: 56a5d0b49a6d63303d523a73098241f1ab31847a386d3dd7085f5410b8f82fd6
font_01_sfnt_off000075eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EB 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00007e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E79 10352 bytes
SHA-256: 22c26935c41e6690443c4a8bb0a1af15454aaa30ea049d0e3fc45321843f1338

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