Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f6204de9b9a70a…

MALICIOUS

PDF

61.5 KB Created: 2020-07-08 12:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 90978c8590ab89f8de1ae1b5a8884319 SHA-1: 4e3295297f2115ba67b1f29f772f39eb39309dc1 SHA-256: 96f6204de9b9a70a8f0fdb8683da40b23977e34ed59802e9ce1d0a4239b8ef1a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on files.littlesharkandco.com. One of the primary links directs the user to a malicious redirector at ttraff.ru, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains the same URL as the primary malicious redirector, reinforcing the intent to lure users to malicious sites.

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.
  • 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://ttraff.ru/wb?keyword=explain%20biot%20savart%20law%20and%20its%20applications%20pdf In PDF document text
    • http://files.littlesharkandco.com/uploads/1/3/0/7/130739769/470126.pdfIn PDF document text
    • http://files.shaftesburyyoungpeople.org/uploads/1/3/1/6/131637325/bigema.pdfIn PDF document text
    • http://files.rscareersupport.org/uploads/1/3/1/8/131871648/c3a5e85fdebeb12.pdfIn PDF document text
    • http://files.pdkualberta.com/uploads/1/3/1/4/131452794/d2861bd982.pdfIn PDF document text
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdfIn PDF document text
    • http://files.spamitzvah.com/uploads/1/3/1/3/131384789/2268709.pdfIn PDF document text
    • http://files.tengutaiko.com/uploads/1/3/0/8/130873830/328260.pdfIn PDF document text
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130739761/zijupepojumoviziwese.pdfIn PDF document text
    • http://files.agsoba-na.org/uploads/1/3/1/4/131456012/nexejepeza-vapuzag-zixivefega-jemigimot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ditokixexup.files.wordpress.com/2020/06/27715165627.pdfIn PDF document text
    • https://kizutakogoz.files.wordpress.com/2020/07/wukememinakexemufepepuwo.pdfIn PDF document text
    • https://dasawiduved.files.wordpress.com/2020/06/rofumewedisigovajup.pdfIn PDF document text
    • https://rakelogexexo.files.wordpress.com/2020/07/56737770543.pdfIn PDF document text
    • https://mafegazavete460328079.files.wordpress.com/2020/07/mozofufefexutijafanesoji.pdfIn PDF document text
    • https://pelidabavigi.files.wordpress.com/2020/06/17681723630.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000916f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916F 5136 bytes
SHA-256: b829fa7da0a68ade0d8b189dcb33c5293c47f766e9580f3c8946a1a8976c7789
font_01_sfnt_off0000a2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F4 15460 bytes
SHA-256: c9b544bd8d56b1d3cee1e35fcced9707c5326fcf933cb3e94f1ed5de6dfdea7e
font_02_sfnt_off0000d36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36E 16196 bytes
SHA-256: f49fba9a07d747c2aef75333049da5f6c2dc0df6e319fb1bc343e90b01369d66

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