Malicious PDF — malware analysis report

Static analysis result for SHA-256 441377a09ce908e1…

MALICIOUS

PDF

40.3 KB Created: 2020-11-03 10:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d174b65186ce9878598bfc7d16548a23 SHA-1: e1c7facb25eea65b95c1ef8dcc705fb8d1a4bd94 SHA-256: 441377a09ce908e190fc7627ca46a80486cbf5f9456a7a8070a242aee5fc8fed
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL, 'https://gettraff.ru/wb?keyword=chief%20educational%20officer%20vellore', is the primary indicator of malicious intent. While no scripts were extracted, the presence of a malicious link within a PDF document strongly suggests a phishing or malware delivery attempt, likely distributed as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://gettraff.ru/wb?keyword=chief%20educational%20officer%20vellore In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f871c644574a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f8a7f1a370cd.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/kisesajotikevezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3179/7149/files/annihilation_of_caste_in_gujarati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0babcd3a-90f8-4f41-842b-60b4d551c774/bozidigidakuraliveme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0567/4133/files/yugioh_duel_generation_cheats_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a73cc5-81ec-40c0-85c3-dbc336571846/intellectuals_paul_johnson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7944/9767/files/metzeler_tire_pressure_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be26bca-0246-48c6-a759-369d9c909ade/mezituf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec4118e-8276-4a2b-a408-e43797097e65/95554295397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a4fb00-cf93-451e-b4d6-c8770a7eb448/zibonarowagefidazefola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5348/0601/files/pokelinegaxivexevat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff73a138-7c8d-4bf0-b3b4-0858c7614891/gepinudatorutaxulimaleti.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_off00006057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6057 4896 bytes
SHA-256: 91d514856eece9076518469fbdbc426afc31e3b6224b5a8e9cd8d6d4f63a7ea4
font_01_sfnt_off000070f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F9 10468 bytes
SHA-256: e7ba98b784a30ddc8e7836429242cd93b621b86356be078d48a6f2146ea5ad77

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