Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd871c315d7e7dc1…

MALICIOUS

PDF

65.0 KB Created: 2021-01-07 21:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ad2250b52c427eeca674c4e87044cdcc SHA-1: 9fd911c135dbb11e9a023ee928dbeb3715f3e810 SHA-256: cd871c315d7e7dc1009686b469e2bf4340fad5ec1265abf38e885dbb81fe50cd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary URL identified is 'https://ggtraff.ru/aws?utm_term=cisco+finesse+user+guide+11'. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/aws?utm_term=cisco+finesse+user+guide+11 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f872908447c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_5fd7ccc6173b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_5fd8463c785df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6263e35-74da-47ee-9814-4f8313a31c7c/xerananebiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c90895-fe26-4985-8e84-a4d562aa2b2d/mavic_pro_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b99eb19-269c-424d-91b7-6c8e87a9f3f4/star_wars_shadow_guard.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/68908010962.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/wemakamafiravuwutaretarom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf56f7d-a097-492d-b085-373ac863b70d/forensic_science_case_study_workshee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4883ad92-7741-4836-90c9-48891c94ecc2/9182378862.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/21808743775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d99d96-5a6e-43ff-9250-e6f7e14a3405/big_baby_tik_tok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be6687f-80d7-43d7-8072-de9137278cac/timazaravatimapaje.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/arithmetic_and_geometric_sequences_and_series_applications_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/posiloseja.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_off0000c398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC398 4904 bytes
SHA-256: 6d9764b3dc3098850fed3ddd21f31bc4b7143e0eeb2deb0191e098aca7890d74
font_01_sfnt_off0000d45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45B 10328 bytes
SHA-256: c09f2db412aca70c962441a5be2411b69973367b04e97b15491ffa3f12859542

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