Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa7b860a297756df…

MALICIOUS

PDF

32.6 KB Created: 2020-11-02 07:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 70757374850d8f5d982b8916f0268d53 SHA-1: e514bc6ae2a5660e4e2caffc06425b0e2df1b619 SHA-256: aa7b860a297756df9765bc761c491d06107d2011985e8652f276924625f44a50
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 a critical heuristic firing indicating it's a malicious redirector and a link farm. The document body, though heavily obfuscated, contains text related to 'Baby lock serger instruction manual' and URLs, suggesting a lure to generate traffic or redirect users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/aws?keyword=baby+lock+serger+instruction+manual In PDF document text
    • https://kowabimope.weebly.com/uploads/1/3/4/3/134359524/dufok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/addition_and_subtraction_of_fractions_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2982282-cc2b-472c-9594-3c22cc67e537/63648198041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136a8864-bf5f-4440-ad21-8281ad4cc2e6/32582900004.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/pefugibufijetozop.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/xajabomabibasebon.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/my_dream_house_paragraph.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/86554756397.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_off00004051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4051 5476 bytes
SHA-256: 068c05c7dcbb8889c3cddcd4ba6e6175e29256b31401c2aa1d001a4c67982f4a
font_01_sfnt_off000052ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EA 10324 bytes
SHA-256: e85a9bbe9043c79d036881d571183d5bb2fa0de5d5dd2c1eab9d12de75708143

Open this report in the interactive analyzer, or submit your own file for analysis.