Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fca52aa9d6189ff…

MALICIOUS

PDF

77.7 KB Created: 2021-01-18 16:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9b6cb56f6a63035e60441d100bbcd8c2 SHA-1: 9d10b9b868c6010b2fa52146d194bc98a3f6a4d8 SHA-256: 3fca52aa9d6189ff80a12e1b38939a505ab084a9859bc053274e9469801889e5
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 'gettraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious redirector URL suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, indicating it may have been generated programmatically to host the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=ni+no+kuni+alchemy+guide In PDF document text
    • https://cdn.sqhk.co/jizuxadif/3eav1TN/finujanevexal.pdfIn PDF document text
    • https://site-1176387.mozfiles.com/files/1176387/93847342549.pdfIn PDF document text
    • https://site-1177607.mozfiles.com/files/1177607/vex_4_unblocked_games_kizi.pdfIn PDF document text
    • https://site-1173429.mozfiles.com/files/1173429/vitamin_d3_vs_d.pdfIn PDF document text
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/vozeniw.pdfIn PDF document text
    • https://site-1180242.mozfiles.com/files/1180242/persuasive_essay_on_no_school_uniforms.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/Gvhhgel/red_lobster_menu_prices_2020_canada.pdfIn PDF document text
    • https://site-1175852.mozfiles.com/files/1175852/dts_play_fi_outdoor_speakers.pdfIn PDF document text
    • https://site-1177347.mozfiles.com/files/1177347/gevameberorinavazijopovi.pdfIn PDF document text
    • https://site-1175456.mozfiles.com/files/1175456/code_deployment_checklist_template.pdfIn PDF document text
    • https://cdn.sqhk.co/defegitip/eiOgcif/tic_tac_toe_song_mp3_download.pdfIn PDF document text
    • https://ronunute.weebly.com/uploads/1/3/1/0/131070227/f2796b431d93ab2.pdfIn PDF document text
    • https://site-1178547.mozfiles.com/files/1178547/26681149170.pdfIn PDF document text
    • https://site-1178096.mozfiles.com/files/1178096/muxuvededusuv.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/OhfhibL/super_pixel_heroes_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/jdhhGtU/lilonixekoresitapikoki.pdfIn PDF document text
    • https://site-1172210.mozfiles.com/files/1172210/smash_cars_video_game.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/wegugus/55567907711.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/audio_converter_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/bangla_new_comedy_natok_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/57883823495.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 5016 bytes
SHA-256: 7e4df1c94c6ec0b9fbd05971490de0c5a9ee8f121619e4d8e528dcff7df2ef0f
font_01_sfnt_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 10284 bytes
SHA-256: 157e1ca75f006dcbd4b030175ed78e2d61ed91085366e82cea72fe4d423cf5ff
font_02_sfnt_off00011b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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