Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2261fa0433a8e7…

MALICIOUS

PDF

85.9 KB Created: 2020-10-28 18:38:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 46f7ccb1ce431093375e1cb89064098a SHA-1: 85d8c5c4fa5a931147c82955c814da480c2c7482 SHA-256: ab2261fa0433a8e7a7b3185e750293f5d288ef666832940e9fa05697b916982f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that likely serves as the lure.

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://gettraff.ru/aws?keyword=full+dress+white+uniform+navy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f97da573dd8b.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/bobazebefuret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f872b6b4833b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8722dc4ab10.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/f18ba12ba7.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/4530131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f89855f27ccb.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/luzefoweloregiva.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/f9007.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/8142125.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/8926815.pdfIn PDF document text
    • https://bubawupuga.weebly.com/uploads/1/3/4/3/134380130/pozorulumozuvero.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/1/0268/7831/2625/files/rivunon.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/92519994962.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/como_convertir_archivos_de_a_word_sin_programas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6479/9644/files/probability_worksheets_math_drills.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/rovumudejes.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ataxia_rehabilitation.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/ammeter_voltmeter_galvanometer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B8 2960 bytes
SHA-256: 4253ce374f546ed82c0b962bfad5e193173c5af7311640f7068ccdda2cb38311
font_01_sfnt_off00011139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11139 5356 bytes
SHA-256: 19d3689e9bcf7c01ae8b7577010b62265778227b29b932966bf2319cf7878083
font_02_sfnt_off0001235e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235E 11188 bytes
SHA-256: 723ed75909d21de256fb21fde02d6411116302ee607f87d94752b98f29b762e5

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