Malicious PDF — malware analysis report

Static analysis result for SHA-256 02076314ceda6c75…

MALICIOUS

PDF

38.5 KB Created: 2020-10-21 07:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 298c040e70e9e24db6d94b72df422a9e SHA-1: 39859f576f752530a42359c2b3d5f910eb180b6b SHA-256: 02076314ceda6c7558f24dae9b1956465e313fedcdadc73f95db6e4703e0af91
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'microwave hot plate instructions' and includes URLs that are part of a link farm, suggesting a lure to redirect users to malicious sites. 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://gettraff.ru/123?keyword=microwave+hot+plate+instructions In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/2c029f.pdfIn PDF document text
    • https://pujatimosu.weebly.com/uploads/1/3/2/6/132681823/lepojezapijogedagu.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/siripudegoveku.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/tavowibekonivubuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f8beddf64b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f88b881508aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f8aab6c38b11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f8f650237570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8a902fdc76c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_5f8b0abfe480f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f880ebb3febc.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/gupuso/45987893482.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/ashanti_golden_stool.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/mutasojixivubuvobojam.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/graphic_design_portfolio_size.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/45415213798.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/31890884428.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/63920929930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9584/files/count_of_monte_cristo_abridged.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5701/5701/files/74383195656.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_off000057ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57EE 5176 bytes
SHA-256: e21915e63e9061d60a059d611b4b192838d7f2d2c475cbb29ea38b08bc3ac347
font_01_sfnt_off000069a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A1 10236 bytes
SHA-256: f1efaea4426fbb10dbf0982e3ee1b41dfcdb822438718b77c6b21e9d25f7c66f

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