Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8ba045926dd6a9…

MALICIOUS

PDF

40.6 KB Created: 2020-10-11 02:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 131ff5decba10e15606cce8258aab955 SHA-1: 52ecf9ed050f0c4fc5453529d93ed1dcd0db9cff SHA-256: ee8ba045926dd6a97b95e5f79ebd65f569be17d139ba2e94acb21eb419c367b7
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are also flagged as suspicious. These elements strongly suggest an attempt to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=project+2016+for+dummies In PDF document text
    • http://zasuvawur.pa3rdgrade.com/uploads/1/3/1/6/131637306/6387000.pdfIn PDF document text
    • http://files.viktorcage.shop/uploads/1/3/0/7/130738572/469e63f.pdfIn PDF document text
    • http://files.jfrenzelenvartist.com/uploads/1/3/0/9/130969656/janafekativesuj_nevepenamo_fisugi.pdfIn PDF document text
    • http://files.streetambitionunited.com/uploads/1/3/1/3/131379115/jivemalegotojazuja.pdfIn PDF document text
    • https://site-1038505.mozfiles.com/files/1038505/besololama.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/josoxaf.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/10775103897.pdfIn PDF document text
    • https://site-1038985.mozfiles.com/files/1038985/jobikibelukanawipadakapu.pdfIn PDF document text
    • https://site-1043668.mozfiles.com/files/1043668/59301788137.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/1/0483/1812/0099/files/thompson_nfa_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/lawn_genie_valve_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/vodozewuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/chemical_reactions_chapter_11_test_b_answer_key.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_off00006103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5480 bytes
SHA-256: 9690522dfaab51891c4038be392c6920375f2fc4df8121661db56b2c49b57e29
font_01_sfnt_off0000739f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739F 10096 bytes
SHA-256: 54d9223e719855bbd706d90b1eebaae90a2deb36da58c71c267bf1fffb711a09

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