Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e24153a2c0cf6e…

MALICIOUS

PDF

41.7 KB Created: 2020-11-01 02:27:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 269e768a610dd9c71163226a20369866 SHA-1: 829161fdf87042281dabe5f2db1bab7cf9697857 SHA-256: 53e24153a2c0cf6e149c41ffe5a84bdf35d911b453b7539f4c8c3cb03c5735c4
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, https://gettraff.ru/123?keyword=20m+portable+vertical+antenna, is flagged as a malicious redirector. The document's structure and numerous links suggest it functions as a link farm, likely designed to lead users to malicious websites. The ML classifier also strongly indicated maliciousness.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=20m+portable+vertical+antenna In PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/9b6d432738880d.pdfIn PDF document text
    • https://rexavinuzuna.weebly.com/uploads/1/3/4/3/134308075/darusukab.pdfIn PDF document text
    • https://vemifibu.weebly.com/uploads/1/3/4/3/134354414/lukupej.pdfIn PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/5828a66efc425b.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/pokijiwowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_5f9cf11e4542d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/141a1fad-eb6a-43a7-802e-1efcac65fe51/86395877617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7511/1586/files/nixutupirikokefiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e010279a-f6ad-4852-aaee-758eb5c8829c/tunalat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4743/6455/files/xalikigivonagap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4b6e67-b108-4aea-85b8-b2e75c27294e/78472780181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a3ac3b-3b85-42de-8b05-784999e22573/15510601709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/most_common_slangs_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6810/3077/files/82835480011.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_off00006334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6334 5280 bytes
SHA-256: 6d01d2ebf68e06f31e778d04aead0dc1adf3d0687460ecf754a7f3841b19afbc
font_01_sfnt_off00007512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 10868 bytes
SHA-256: 30d08df8c53cebf45fccbf57bcbaa5d4bcc49fe5fb4ddba2d02da6ef54d237a0

Open this report in the interactive analyzer, or submit your own file for analysis.