Malicious PDF — malware analysis report

Static analysis result for SHA-256 c184582c90c6f71b…

MALICIOUS

PDF

56.3 KB Created: 2020-10-27 02:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f4b31544eaf71295f7f9546b8f7afd99 SHA-1: 803b7e18593978d64d069d64ae9896b98740b52c SHA-256: c184582c90c6f71bb5778dbe293b6a12d409d2dba8d342d4b2b754a48944fbff
162 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a critical redirector link to 'ttraff.com'. The ML classifier strongly indicated maliciousness, and the document body, though heavily obfuscated, contains the same lure text as the redirector URL. The presence of many PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=lil+rider+wild+child+motorcycle+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_5f94edc08c988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f874f7a3afaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5f90b79277f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f875faa5e23b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f90e180cb805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8f724682340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_5f972674a421e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f95289b9829e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5f9336a20925f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f8ac6f23f011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5f94a0974b480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f89c69b2c970.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3373854.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/8982451.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/651409.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/rijokebetol-mazedaxabexadik-wisiluredesub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/sri_bhagavatam_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/helix_antenna_design.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/5286465955.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://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_off000079c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 5020 bytes
SHA-256: c2f522d5a8a619b278b1308c2be7fbe3591a89a6e44bd3f039de04436a1afa46
font_01_sfnt_off00008aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA9 10924 bytes
SHA-256: f99b804b51a1e8c4a742218078485a02acdda1dc1aa2cd7228618fe9c716bf2a
font_02_sfnt_off0000afdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDB 16120 bytes
SHA-256: bab6dfcad0dfd0ccf55b069a5c5c5802f7cb5ab1f4a58e02a3bd0fa3b9c18a07
font_03_sfnt_off0000c4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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