Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a382681a602eab2…

MALICIOUS

PDF

45.2 KB Created: 2020-10-24 02:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 21ff148d7d5de1d67b31dfab41f6ef86 SHA-1: 39a0508841aed861a136dbc06bff31918efd5768 SHA-256: 3a382681a602eab2d01a56f50b01167813a592c99e4a9edf7c58e2f302d7e54c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. One of the primary links directs to 'https://cctraff.ru/pify?keyword=elevation+mask+2.0+size+guide', which is known malicious infrastructure. The document body appears to be obfuscated or corrupted, but the presence of these links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/pify?keyword=elevation+mask+2.0+size+guide In PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/vakizimevegep.pdfIn PDF document text
    • https://kagadema.weebly.com/uploads/1/3/4/4/134456650/601cf6a45f126.pdfIn PDF document text
    • https://valoxapemep.weebly.com/uploads/1/3/4/3/134305175/rigesavijon.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/449769.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.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/d7fd2826-9c6c-4a4a-a9df-1a340068c7f5/44311763067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa7dc13-573b-4ee9-a4c3-c72dea0a1fd4/omron_hem-_711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc13e0a1-5e18-4395-8a19-6d035ed810ed/8533729665.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/99872127246.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/vatagirekipanup.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/65895845350.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/isaiah_berlin_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/53876330640.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/98883979220.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/44577950667.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/verb_adverb_adjective_noun_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/dna_blotting_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/three_waves_of_feminism_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/different_types_of_analytical_balance.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/competition_law_in_india_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/ate_ve_su_2_yandex.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/learn_cursive_alphabet.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_off00007263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 5488 bytes
SHA-256: 66cc13b332f1d9d1fdc9455aa753ce39f1878f864f42d2a987eaaddb38329ffb
font_01_sfnt_off00008515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8515 10064 bytes
SHA-256: 18eb888edf056d23590dfa25add90fcf77b4a363e9891e2967ae7c4e50a84f3d

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