Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da835cb54a02445…

MALICIOUS

PDF

76.2 KB Created: 2020-12-06 02:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 07ff1a85e706089ee4322439570ab55f SHA-1: 180d4a26fad1b7f6d73357c5c4eb68954140790c SHA-256: 9da835cb54a02445f03985a807455f6bc0f5b0e05dda0018fdb24083ecd32232
214 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 'ggtraff.ru'. Additional heuristics indicate it's part of a link farm and flagged by an ML classifier as malicious. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=death+in+reversed+and+hierophant In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8af4bc7bbbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_5f9b2448123c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481068/normal_5fc74a2e5a28e.pdfIn PDF document text
    • https://xodunutejoxefis.weebly.com/uploads/1/3/4/4/134476009/pukamikavodedu-jeparobum-vimizodezo.pdfIn PDF document text
    • https://vepiduworubul.weebly.com/uploads/1/3/4/7/134723348/bawabopilav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_5f9e20117b269.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://static1.squarespace.com/static/5fc0e526c6229360ecacefcf/t/5fc5de7df3de5e49b5309da5/1606803069950/62895971867.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62aa3f75b16643ccec9b/1606378154838/74438218995.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/uninstall_bloatware_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rutojo/92289202082.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc434eb9d79364840137714/1606694123801/unit_2_constant_velocity_worksheet_2_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc35e67cd1e280355e3f728/t/5fc552194f983757208ef8aa/1606767129944/vuzitukinuzezu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc34a14bda9c57a97cd8cb5/t/5fc5577fa97599144eaaa5ef/1606768515166/walavavulidolakutoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22ade63-4d11-4d61-87be-ff871ea56bdc/vipimutoxajuwiwavoxatoso.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_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 4860 bytes
SHA-256: cc531b5ca038021d48afc1ee08671485ac46f04540217769c80b7742ecddc115
font_01_sfnt_off0000f39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39F 9968 bytes
SHA-256: 95db6393027f1fc2a6784d22a0047fa139fc9b85729219cfb4655b66b9776ecb
font_02_sfnt_off000115b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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