Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ccc4b8bbb2bc46…

MALICIOUS

PDF

42.6 KB Created: 2020-10-26 11:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4b19306daa5c799337f87f8edc537e15 SHA-1: e847428d3486e91c900e661d3c3dfa2c73b12f3e SHA-256: a0ccc4b8bbb2bc46f198b5f268d03f8826da647a5503d30089b1d0ad56333fdb
174 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ggtraff.ru/pify?keyword=messenger+apk+for+ios+download'. The document body also contains this URL and other benign-looking PDF links, likely intended to obscure the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/pify?keyword=messenger+apk+for+ios+download In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/695bbf852abce.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/batug.pdfIn PDF document text
    • https://wonidajubiput.weebly.com/uploads/1/3/4/0/134017859/7924695.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.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/jezaxojipevu/daxulafixijutuluk.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/capites_da_areia_livro_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/netaji_subhas_open_university_assignment_front_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7727/6326/files/1966_corvette_value_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0473/8603/4345/files/82975501727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/civil_engineering_experience_resume_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1701/8267/files/jajuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6544/1445/files/steven_skienas_the_algorithm_design_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/30277433365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8744/8214/files/abraham_lincoln_vampire_hunter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1086/6851/files/end_of_school_year_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/62619262843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/smart_spoken_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3922/7543/files/android_grayscale_camera_preview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/laruzigonusimitekazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/undefined_reference_to_vtable_for_destructor.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_off00006895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6895 5372 bytes
SHA-256: 133815a408052ef89c32eb93c604d861f53f7a948746fb14eb7b26ddf0d01e5d
font_01_sfnt_off00007b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B04 10068 bytes
SHA-256: 7a8353fb818cf67be82b286220580c1b447580bec7735db90a007accec6919da

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