Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0370643aa993326…

MALICIOUS

PDF

58.7 KB Created: 2020-10-30 10:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4d3e8768e97cfa76aabccee7e3a57e6b SHA-1: 894973776fcf1dd1910e5307502ab1b7f4d1a07e SHA-256: e0370643aa993326378759d068541c4147e164306c99f2c0c6b518cbc0e04df6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Bingo blitz hints and tips' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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://ttraff.com/123?keyword=bingo+blitz+hints+and+tips In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f8c4724bb94f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f8c6b28261f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5f91b6a38f103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f8e648e255c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_5f8f685969441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_5f96572a9ed48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_5f98ad5a80f33.pdfIn PDF document text
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/3c2d378c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f96575c6b3fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f88d1190407c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6352/3528/files/tafoxogifuwuvinefukara.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/traditional_bowyer_s_bible_volume_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6125/4575/files/electronic_signature_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b289b758-9acb-4e68-966b-9b522224db30/alfabetizao_e_letramento_caminhos_e_descaminhos_revista_ptio.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/kikereripizubirisiwolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb05a21-355c-489a-aa18-66c87269fe7b/94195371248.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8116 5364 bytes
SHA-256: 4c94eb99fa0b4a872c7634448ef53b9b05b10a2cdc3870708f2027c86c1142d6
font_01_sfnt_off0000934e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x934E 6400 bytes
SHA-256: df4da5dad16320fc2bd6ead6a7f19aaf0f7db564b0f7443f94b7c78f534e8c07
font_02_sfnt_off0000a40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA40D 10548 bytes
SHA-256: e5aff2508e3b8570022912031a5db0ac12decb9b17fd5b32b515d3bed59cb428
font_03_sfnt_off0000c81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81A 16028 bytes
SHA-256: 6e14d9a23925fbdd927c7db5f893cbd4d80a19524b1aae448d44ee15d2611241

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