Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a85b784d70757c…

MALICIOUS

PDF

43.4 KB Created: 2020-11-01 02:33:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bc8c305595a71a03dd481d8ff14fe2b6 SHA-1: 94edbe756c1f91621f07e88f7aef86ab1f4d8ed5 SHA-256: 65a85b784d70757cc05cadce189d993527e948ded9180e3abd4aac779609494e
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically identified as a malicious redirector and an SEO link farm. The primary malicious URL, 'https://ttraff.com/123?keyword=gypsy+jazz+chords+progressions', is likely used to distribute further payloads or lead to phishing pages. The document body, though heavily obfuscated, contains references to the same URL, reinforcing its role in the attack.

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/123?keyword=gypsy+jazz+chords+progressions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f8b4a11a2bd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5f8f250a2f82a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f8896bc3e4b3.pdfIn PDF document text
    • https://pukaxonimuno.weebly.com/uploads/1/3/4/4/134435323/firizuwatazawaxan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f8b72f042107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f9e00e8b6d15.pdfIn PDF document text
    • https://vabofofed.weebly.com/uploads/1/3/4/3/134337048/navifutipe-kovezunujofas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f94caadcd7c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8a5dd309911.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/jidukeje.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/1/0496/2634/9719/files/gelabetudoligafex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4217/1797/files/4049970645.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_off000068bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 5560 bytes
SHA-256: 3b0ed3f68ab3007a7cdbbe09bbf0809a334281ad8921c79acd0b4adc9093b29b
font_01_sfnt_off00007bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 10952 bytes
SHA-256: fd4113dbbe50e758aa03e7fafd607551bf8ae23aa5359c4aff1b19b1f9a9a1ad

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