Malicious PDF — malware analysis report

Static analysis result for SHA-256 86dbe573a93c0cae…

MALICIOUS

PDF

52.9 KB Created: 2020-10-28 22:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1813500e02838136f20fadccb7a88789 SHA-1: 2786ec3676c5a52a10151a489bf8dd30445d2127 SHA-256: 86dbe573a93c0caeb9de1a5770a605fb736a458177c935d0b02e266c86b04eeb
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ggtraff.ru/aws?keyword=how+to+type+alphabets+in+phone+keypad'. The document body, though heavily obfuscated, also contains this URL and a large list of other URLs, suggesting a link farm designed to redirect users to potentially harmful content. No scripts were extracted from this sample.

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.
  • 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://ggtraff.ru/aws?keyword=how+to+type+alphabets+in+phone+keypad In PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/dumibibawogonuf_zanenavadofe_firaxavolu_nuzanoj.pdfIn PDF document text
    • https://pudegubazamase.weebly.com/uploads/1/3/1/1/131163945/6bbefedfd08f.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/nogid-zaxisewat-lizoreb-zapekatuta.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/motirala-vepojivoral.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/narolafutaparowar.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/xosabata.pdfIn PDF document text
    • https://guxewegitonis.weebly.com/uploads/1/3/4/3/134336720/sililasumelasozixadu.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/6382172.pdfIn PDF document text
    • https://gezeteweni.weebly.com/uploads/1/3/4/0/134040803/993ffd.pdfIn PDF document text
    • https://zukezima.weebly.com/uploads/1/3/4/3/134345014/6750998.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/6594323.pdfIn PDF document text
    • https://nikokitigo.weebly.com/uploads/1/3/4/5/134500207/4306272.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/wonudejefezuvin_rojusowowasap_wixurokete.pdfIn PDF document text
    • https://wojawafelufofux.weebly.com/uploads/1/3/0/8/130813934/4661938.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/1/0497/2914/2943/files/wulun.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/pdf_fillable_borrower_s_certification_and_authorization.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5915ad-908a-4d78-aec0-59fc513326d3/bezegifutisoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1bb880-006a-429b-8c90-448f3ceb0c49/menufejojorefosimefoliwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2201b516-6d90-4aa9-997a-afdcd7398d56/wejuxetadetar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8593/7818/files/desert_biome_animals_and_plants.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7828 5312 bytes
SHA-256: 9894397c9562b4ed6f1cb29e117b311280541b062fae852d58e1bd9ba97bb5fd
font_01_sfnt_off00008a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A38 11012 bytes
SHA-256: ca6a43326ad0a9e529965a7f1d528ad93b2a711fb36f5bd99481af31ab264ba0
font_02_sfnt_off0000afcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCC 16484 bytes
SHA-256: 4a41d7e182d54c13fd0401492552211af2609381ae6f503edd12761a0a0b0f88

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