Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c22515160cd835c…

MALICIOUS

PDF

45.2 KB Created: 2020-08-07 09:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdb7eb8225135c45b435ca8449ef058b SHA-1: f025d5c71a1078149841a1ce3e87ada721d12da9 SHA-256: 5c22515160cd835cb826717c1d7c1fa5be0520d075ca59c0789ca7832c025814
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute malicious content. The presence of a malicious redirector URL points towards a phishing or content-luring attack vector.

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://ttraff.cc/pify?keyword=fusionner+deux+fichiers+pdf+avec+foxit
    • http://files.berenikakolomycka.pl/uploads/1/3/0/7/130739968/mefirul-jikeselokodale-darerased-simajanegenutu.pdf
    • http://tizininu.treeofed.com/uploads/1/3/0/7/130775257/7729665.pdf
    • http://files.thekeytotorah.com/uploads/1/3/2/7/132741555/robizem.pdf
    • http://files.miguelchanonafotografo.com/uploads/1/3/1/3/131383743/vusizalaxajowat-laganebis-zovokinex-lavusuba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/46610914136.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/the_pale_lady_story.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/arlena_witt.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4327/files/juribo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/32200481192.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/togifetenikozupeki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vozazugimutiwobawaxuleg.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/85178452239.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/bixufazewetet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/polinaponimujibidana.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/campus_interview_format.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/tawulawidamovujevojava.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e86.bin
77da69452b0891cad1f3b60c471f65c3ffd1eb47664f899ca886c9966edb6916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E86 5176 bytes
font_01_sfnt_off0000701c.bin
c046190d9ba5aea92c843630fb5c3e4a2498a2c000d220f9aea7d70c44f97952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701C 12908 bytes
font_02_sfnt_off000097e8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E8 4324 bytes

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