Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4b46888475c3eb…

MALICIOUS

PDF

77.7 KB Created: 2021-01-07 20:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1cd4e1f04a75cbd444c75f6956f6d435 SHA-1: c1aaaaeacd92bb6971508eb05a8b78810959692e SHA-256: 0d4b46888475c3eb4da548780160dbd04959fadbe4e4ad212e6585392270c25c
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'traffine.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, some of which are to benign-looking documents but likely serve to obscure the malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, consistent with a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/wb?keyword=glow%20art%20drawing%20board%20pens In PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/1d4be6e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f986ad289266.pdfIn PDF document text
    • https://gitijekukojijot.weebly.com/uploads/1/3/4/6/134626905/betitewa.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/nuliwoton_tovevepexukagaz.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/jefakokararemoxukizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nisiwanolom/protestant_bible_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/11196363677.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/granado_espada_master_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40ee043-1dc5-438d-ab1d-0b5fd788d2aa/marvel_super_war_apk_3.7.3.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/first_and_second_world_war_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/chrome_free_windows_10_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/wotitezavalewi.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/sony_bravia_43_inch_4k_android_tv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 5176 bytes
SHA-256: 5bf2803ed2bd7d9230f6d458ed7d994467ec832d48e28c61a68873a80d7d2137
font_01_sfnt_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 10828 bytes
SHA-256: e8e3dc16652c8299c88239bc926db1a2d40238cfd7570165a66f582d19e781f2
font_03_sfnt_off00011bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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