Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf2269ff1b75485…

MALICIOUS

PDF

83.7 KB Created: 2021-01-10 08:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 90d1b1bac10248aa0b92267e860fa6a0 SHA-1: df20be09ba5ed6e8d423e15eeecb84c8225f19e5 SHA-256: aaf2269ff1b754855f4d27d555f44a406938aba32d57027d3a8752727af9afba
214 Risk Score

Malware Insights

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

The PDF was flagged as malicious by multiple heuristics, including a critical alert for redirector links and a link farm. The embedded links, such as 'https://gettraff.ru/aws?utm_term=coniugazione+del+verbo+chiamare+nella+forma+attiva', likely lead to phishing or malware distribution sites. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/aws?utm_term=coniugazione+del+verbo+chiamare+nella+forma+attiva In PDF document text
    • https://cdn.sqhk.co/wanuvudeb/hdOhbjh/guide_osmo_pocket.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_5fae0a72107de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407818/normal_5fc1c1819537d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8a709e4a792.pdfIn PDF document text
    • https://cdn.sqhk.co/kejopala/HqNnJjj/best_free_photo_editor_program_for_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5faa7dfb1fd91.pdfIn PDF document text
    • https://vowimusu.weebly.com/uploads/1/3/4/6/134655535/2807080.pdfIn PDF document text
    • https://site-1174356.mozfiles.com/files/1174356/72388515023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5ff2aeec6e320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f952086c2d42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fcb36d0583b9.pdfIn PDF document text
    • https://lemuladi.weebly.com/uploads/1/3/4/3/134316580/8180364.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/midizaxopazeji/56107187113.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000f71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 5412 bytes
SHA-256: 58c09f63db21c99e15610432ca4a7f35152be1f9f4c88be55f93cff855c14f8a
font_02_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 13032 bytes
SHA-256: 61237c5ec320a8b6e6341f2daa15e0bbb2d060323d0f374d629e53269773dc1b
font_03_sfnt_off000132d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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