Malicious PDF — malware analysis report

Static analysis result for SHA-256 a229069d6f09a135…

MALICIOUS

PDF

81.0 KB Created: 2020-12-27 12:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ec48082d36ad2d52b680233687cd04a9 SHA-1: 04c34cebbc1d057779eb17c3a60c08e73c069c5d SHA-256: a229069d6f09a13590becbc16b759fece1553ec142aa82a248879b3599be8fd7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=amino+for+rick+and+morty+died'. This indicates the document's primary purpose is to lure the user to this external resource. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=amino+for+rick+and+morty+died In PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fcddf257048d.pdfIn PDF document text
    • https://cdn.sqhk.co/rodoruwuwab/jhCVghX/ear_wax_treatment_singapore.pdfIn PDF document text
    • https://bujasosepamus.weebly.com/uploads/1/3/4/6/134626994/rakaguruzavak.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/sogonezolejapebaduf.pdfIn PDF document text
    • https://pemogadisazur.weebly.com/uploads/1/3/4/5/134583379/7388790.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/iihXHjc/aesthetic_tumblr_quotes_wallpaper.pdfIn PDF document text
    • https://xibemorebag.weebly.com/uploads/1/3/4/3/134355918/jujefu_kujofis_bibubovan_ledebozudabozi.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/lonozote/88165700108.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/katazizefodix.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/please_answer_your_phone.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC2 3604 bytes
SHA-256: 7119bc71ebb191b6514d00934fb639a9f2f390346538a1bf92730b9cc2572052
font_01_sfnt_off0000da5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5B 5112 bytes
SHA-256: 97e49161c17d941dd6a192bff002b9d5b00156092bb557554d3b9fbe9f3d4787
font_02_sfnt_off0000ebba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBA 14820 bytes
SHA-256: b2b6e97e837a29354be05394115e466d97457fe4353089cc976ff772b92f446a
font_03_sfnt_off00011d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D34 16932 bytes
SHA-256: 9f9b7d7283a6a0b64ecbc18c0d9f2142d8619eeb84a2b6ac5bb4afe6eaf90254

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