Malicious PDF — malware analysis report

Static analysis result for SHA-256 693eff2dd031428d…

MALICIOUS

PDF

49.2 KB Created: 2020-10-18 23:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bd43731c11d5d2114abb666d3ca5bd8a SHA-1: ad5add59960f4e9201ed5f5455441666f7c7bb17 SHA-256: 693eff2dd031428df93695e5db111be138f5af7f20c1be8abd2417a81ff744f3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other links, many pointing to benign Shopify URLs, suggests a link farm or SEO poisoning tactic to obscure the malicious link. No scripts were extracted, but the PDF structure itself is flagged as malicious by ML classifiers.

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://cctraff.ru/strik?keyword=nba+2k17+mygm+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f8b9bc2b6806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_5f8a2cd914823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f891e8338960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f890a8264a9f.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/ponulugonoma.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/voxiwaximimifugusadi.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/9983eb59d859.pdfIn PDF document text
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/kavufo_vofugu_ruketi_vowaladatepu.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/ba591fce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f88496499161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f87094f5bcd5.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/6829012.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/f6e6497dc.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/1/0493/5850/4092/files/directions_to_philadelphia_airport_long_term_parking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4473/2580/files/night_city_map_2045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/exercice_corrig_distillation_rectification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1532/5861/files/54145986764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2103/6452/files/divine_attributes_of_the_holy_spirit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4138/9724/files/topepakotazifiruzokoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0341/9556/files/lujexitogapedax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9300/9604/files/nwu_type_3_boot_instruction.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_off000080c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C2 5380 bytes
SHA-256: 2e5ef8f17bb8e8996eb33e09500a6c68d19df40127bfc10d113d81879d62055e
font_01_sfnt_off00009317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9317 10580 bytes
SHA-256: e7c768b55986804de6d543f5927526111d9a2a83f33f1b67b8ad62f1fb8efc6b

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