Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee2ca6439420ac5…

MALICIOUS

PDF

45.3 KB Created: 2020-10-29 21:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 044b9bced0c52145ed4bffdea46fed1c SHA-1: 80f63965702e2a02c04538505c58f20a7cd75dc9 SHA-256: fee2ca6439420ac58a2fade785d022c41fad67e684d3de45e9d899eb5d82b86b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.cc/123?keyword=cyclops+engine+fragments+crag+field', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document appears to be a link farm, likely intended to lure users to malicious sites.

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://ttraff.cc/123?keyword=cyclops+engine+fragments+crag+field In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/92fff09b7fbc15.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/9951184.pdfIn PDF document text
    • https://tujebikofo.weebly.com/uploads/1/3/4/3/134359874/legepatol.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/rizawi-simixolukosaku-pulafij.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/bomuxiditofik_sajig.pdfIn PDF document text
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/260e426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tadovu/80065663496.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/11138407864.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/7123566959.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/netorowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/4487/7462/files/balancing_equations_chemical_reactions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/coconino_county_jail_flagstaff.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/cetoacidosis_diabetica_harrison.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3808/0668/files/podufironuzujizomo.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_off000071d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 5484 bytes
SHA-256: 8af25792769c1f13b3cfe065c8428776a38eef9b5c1629822b382b0bf658a7b0
font_01_sfnt_off0000846b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846B 10572 bytes
SHA-256: af5254ccd5e1cc61782fc2bd2e004ff276c94c4fd9d6f1b2eea5e03059f790a7

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