Malicious PDF — malware analysis report

Static analysis result for SHA-256 7477cf1a3d51501b…

MALICIOUS

PDF

53.0 KB Created: 2020-08-17 04:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97a6840a5a8908688f927886eb456633 SHA-1: 7b5ffa55464bb065090d641ca260a96d97dbd92b SHA-256: 7477cf1a3d51501bc43136e2bdac8545d8e05eeda8359ed8636fea00cce71dc1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=auditoria+administrativa+pdf+benjamin+franklin
    • http://dagidef.strategicposture.com/uploads/1/3/0/7/130739017/ritavin_bujukuturu.pdf
    • http://buloki.lgmcferren.com/uploads/1/3/1/3/131383629/c851d78ae4c857.pdf
    • http://maxivesab.giveadogabonephotography.com/uploads/1/3/0/9/130969744/lopinosumiwo-jimogoxar.pdf
    • http://files.fourcornersfiber.org/uploads/1/3/0/7/130776276/mojakadenu_kemepule_jefajuzebeto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/bufan.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/34989530739.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/math_grade_7_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/49772197773.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/21986819552.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/4646100900.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/1409488020.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/how_do_you_droidadmin_on_firestick.pdf
    • https://cdn.shopify.com/s/files/1/0434/4053/7750/files/12729933151.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/64079399913.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/sezidexob.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/gebaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/capital_humano_definicion.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_off00008392.bin
5fe26a824ee66917ccf5678099ee5ad5f51369426d6c58e006de2be259782016		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8392 5396 bytes
font_01_sfnt_off000095d5.bin
7eb9d9b30d8f7518a112f8f0c8bb7f875bfc21ea65ea43773370d9857cc6aa30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D5 10132 bytes
font_02_sfnt_off0000b87a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB87A 4324 bytes

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