Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf49a407acf173f…

MALICIOUS

PDF

60.8 KB Created: 2020-11-14 11:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 247707f04412a7c67b2f7fd9d5c7e726 SHA-1: 0212263a497d2b2477593cbd918b022d45abe889 SHA-256: ecf49a407acf173f1abaa5ee26447aa466a7b06a77e913bd4b0c5130ca5c7db1
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 'traffking.ru', which is also listed as an embedded URL. ClamAV detection and an ML classifier further indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to an 'Oxford picture dictionary PDF'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/123?utm_term=oxford+picture+dictionary+3rd+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_5fa296c1aaf4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5f922718372ae.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/cdf2a11e-caeb-455d-a775-7d15cc3c998e/18513193029.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/magic_chef_mini_fridge_manual_18eyw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3624c55-3389-4b5d-951e-25c48fded9af/feligolatulewasoteruni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8513ea0b-fc59-4ff8-a1c1-4510a6345553/69055161334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf39dc6-7122-4fd1-9ac0-5559179b6891/bosch_dishwasher_training_repair_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c81c429-6dae-4204-a6d3-8502aa0b424c/pogiravenufox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4370f6a5-4240-4f0a-b679-ae3e636bcf39/when_is_the_peach_bowl_in_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/wenexowulafusugifineke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95e0a90-d3d4-4a1f-8048-6ecd7a3e9257/30067224079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817068e2-af19-4a10-b496-d28402503ca5/12927055047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ac4432-dd8f-48d9-87f0-94a213dcf8b6/22016614530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd542daa-2358-4a02-9e07-a5e1ee77560d/jaane_kya_chaahe_mann.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_off0000afc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC4 5300 bytes
SHA-256: bf35b2606668adb29b6bdae554066272c0f3d451900694c55703c785a7daa397
font_01_sfnt_off0000c1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EC 11124 bytes
SHA-256: 3202942f6ebf131fa8b56db3fb17694b22c80c3982d0fbac8405525f318274ce

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