Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44a287d0fd384f8…

MALICIOUS

PDF

38.0 KB Created: 2020-11-01 03:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 53c20c0fc5a4f1123f8e7c7488b44a45 SHA-1: 248de5488ca4dcb25070f4c7cbf54fa30babdf82 SHA-256: c44a287d0fd384f874ade823c61de7df375e1d15a7a717c222b50871b7ab8501
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=worksheet%253A+methods+of+heat+transfer In PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/gawegurovagutakav.pdfIn PDF document text
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/tawazeru-boripimeporoti-vibutelefepi.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/firunuzukuvikot.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/3727096.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/ninojafuduzobofiji.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/fozanozadafor_pobuvudimozexur_vopivewevugiv.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/1/0432/5782/3390/files/finlandia_hymn_this_is_my_song_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/ap_human_geo_midterm_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/41855918915.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/xakowimitiripezigofoziwuf.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/far_cry_4_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3050/2312/files/calminex_pomada_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6616/2841/files/harriet_the_spy_blog_wars.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_off000057f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F6 5240 bytes
SHA-256: 90760bd48bb59e9d9475f60de522f14779560a99079c705d39a32cc234ca19d8
font_01_sfnt_off000069af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AF 9784 bytes
SHA-256: e0c8f4d657117cef1ba38c02fbd51e09a3e61d6cd4192a15d69f73269566f8f1

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