Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd5b5243d4e6779…

MALICIOUS

PDF

78.5 KB Created: 2021-01-17 16:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ba3caddeeb1971d315163fc41649aa81 SHA-1: 1a249d5ed62ef9374bb84e23da398fd414785725 SHA-256: cdd5b5243d4e67797cdbd4941db0ee2ba430f2c3952419762324a1314a4ba97f
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://ggtraff.ru/123?utm_term=amanda+c+miller+instagram'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=amanda+c+miller+instagram In PDF document text
    • https://cdn.sqhk.co/goberirud/chfidgf/smart_balance_buttery_sticks_vegan.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/EAKQidw/zitidenakafokime.pdfIn PDF document text
    • https://site-1083781.mozfiles.com/files/1083781/tifek.pdfIn PDF document text
    • https://site-1176306.mozfiles.com/files/1176306/challa_uri_song.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/ffORhhy/25249340664.pdfIn PDF document text
    • https://site-1196465.mozfiles.com/files/1196465/83075148402.pdfIn PDF document text
    • http://japadalifu.22web.org/59735971766.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/rogotinifujorikexubaxujo.pdfIn PDF document text
    • https://cdn.sqhk.co/vejanozugova/jcMbvhc/90932498161.pdfIn PDF document text
    • https://site-1171725.mozfiles.com/files/1171725/lukifofoteret.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujujum.epizy.com/87262462303.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/animals_coloring_worksheet.pdfIn PDF document text
    • http://mugekalamiwatek.epizy.com/valuvufelarid.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/74972565101.pdfIn PDF document text
    • http://batogegimuwew.rf.gd/67959572725.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/vopowozimisidev.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/sad_life_status_for_whatsapp_video.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/27046045474.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/75100941732.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_off0000e769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 3544 bytes
SHA-256: ab2f7ee41a83bb639c1c38a4f6b33430a403198f377a23e06d4103c4663e9379
font_01_sfnt_off0000f423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 5248 bytes
SHA-256: ea01ab38f9d288cff2c5bf7262742aeaf8b1be3bb37e691d9da314fb8b0f6b16
font_02_sfnt_off000105e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 11220 bytes
SHA-256: 1365db148c01eeb6562601e160e4c33a7c5c5e5a3890850dab79995b51d16b79

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