Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdee863da73d7c48…

MALICIOUS

PDF

44.5 KB Created: 2020-10-27 12:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2e6a3b32126068a4ea3f7e6b283d81 SHA-1: d6ab7bdefd37ba12ae4e24f987d6b5a272695ac3 SHA-256: fdee863da73d7c48b18c7a0da39f0f57b2148def58c17a563cb67bac5653c862
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to Weebly-hosted PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'ggtraff.ru'. The ML classifier strongly flagged this PDF as malicious. The embedded content, though heavily obfuscated, contains URLs that are consistent with the observed heuristics.

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://ggtraff.ru/strik?keyword=half+life+models
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/7061675.pdf
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/9578759.pdf
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/fc60b04.pdf
    • https://mitixofixomu.weebly.com/uploads/1/3/4/3/134333727/1423589.pdf
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/rudesejibafenikab.pdf
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/4bd6fe8.pdf
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/tisiwatijew_zixilawoj_gowewoniloramu_jisokime.pdf
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/446cd6.pdf
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/welutemavaluli_rinudiladun.pdf
    • https://nozutijakowuv.weebly.com/uploads/1/3/4/3/134305587/bavuk.pdf
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/baxuromefoz.pdf
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/239232.pdf
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/477c3af4540.pdf
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f8a24f8f17fc.pdf
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f97822e734e2.pdf
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8ea00dd7f8b.pdf
    • https://cdn-cms.f-static.net/uploads/4414847/normal_5f97e4d87d405.pdf
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f872fcd924df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wilugugo/jogokamuvolizonaxoji.pdf
    • https://s3.amazonaws.com/faluzotixupi/86466751440.pdf
    • https://s3.amazonaws.com/tadovu/advanced_trainer_vk.pdf
    • https://s3.amazonaws.com/rowubunak/oxford_new_enjoying_mathematics_textbook_for_class_4.pdf
    • https://s3.amazonaws.com/mijedusovineti/autocatalytic_reaction.pdf
    • https://s3.amazonaws.com/xajowu/alliteration_examples.pdf
    • https://s3.amazonaws.com/tadovu/preschool_activities.pdf
    • https://s3.amazonaws.com/figugipopar/books_free_download_in_urdu.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/exercice_barycentre_1ere_s.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f12.bin
dcb998eeae0d56a0cca222cf1a4f2c11b85776553505bc82634f7715ee2eccaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F12 4920 bytes
font_01_sfnt_off00007fc2.bin
0a9fdbbc487fe60ddd23756d57c3c397778c3f834f73c9b04934f6df540e9c74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC2 10704 bytes

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