Malicious PDF — malware analysis report

Static analysis result for SHA-256 6609077c7469a556…

MALICIOUS

PDF

42.2 KB Created: 2020-11-02 03:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cb604102b3391b3a7afaa0e34792a4a5 SHA-1: 217f3d198bd508ce7da2269a9a601ef32efee05c SHA-256: 6609077c7469a556c074e3c29f3f1f3cd67433d9877c75b3b22a069e345c9a3c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm designed to direct users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/123?keyword=honeywell+5834+4+manual, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/123?keyword=honeywell+5834+4+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f877d41ccb2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_5f9f31339505a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f8f5dc135619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_5f99beef9563a.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/1/0504/6924/1010/files/aluminum_design_manual_2010_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4168/4125/files/ub_north_campus_parking_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3295/8878/files/sekonic_illuminometer_i-346_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5581/5093/files/femuzir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6907/7173/files/hadees_books_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09312435-8ee4-4a09-8ecb-c917414994e1/15644052278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4475/1528/files/12628581452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8028/0983/files/70377582343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8916/5981/files/timurajijezekizan.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 5280 bytes
SHA-256: 20c39dd0a1cae02bb1b599f07da13893ff3d65a0686d957df7a4058430441f17
font_01_sfnt_off00007667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 11176 bytes
SHA-256: ff80aba49dabf30af2d74a791315b3324744810da8c2ad6e04ed9243968d4307

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