Malicious PDF — malware analysis report

Static analysis result for SHA-256 73596ac153730753…

MALICIOUS

PDF

49.0 KB Created: 2020-08-09 18:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36e7b21d8c9cdf5170f515b04cd1afc7 SHA-1: 5acafd357136135c6cd2a9e6fec9629c517c6e40 SHA-256: 73596ac153730753a5f7395cc2e48dab4912e9f1aae876a19bdebfc18ae9e251
154 Risk Score

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 hosted on various domains, a technique often used for SEO poisoning or to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. 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://ttraff.cc/pify?keyword=articles+contract%25C3%25A9s+fle+pdf
    • http://kisixu.dancingravenstoneworks.com/uploads/1/3/1/1/131164250/xunimofizim-govipijixuzerev-gusodusofum.pdf
    • http://files.onesaint.org/uploads/1/3/2/6/132680808/2648013.pdf
    • http://files.spabotanicatrading.com/uploads/1/3/1/6/131606839/duzijitut-wenutuja-pefalujajamirit.pdf
    • http://files.outcomemedia.com.au/uploads/1/3/2/7/132712096/zivelagenalidi-senupof.pdf
    • http://files.youtubetv.org/uploads/1/3/1/0/131070506/bd5908d7a18cf4c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/access_consciousness_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikujolam.pdf
    • https://cdn.shopify.com/s/files/1/0438/4564/8546/files/48438156535.pdf
    • https://cdn.shopify.com/s/files/1/0437/9397/3405/files/nazamajajajumizini.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/jepuwokovudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/pekatasotovobesekiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69651331918.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/98372424845.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5848/files/automatic_car_parking_system_project_abstract.pdf
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/10629482264.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7121/files/high_school_biology_final_exam.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/pigovudufaledetizosow.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b4f.bin
9d5f54d4f82aa9915ffdf12a8f976c8682d06ff55becef0deb10132c29af1147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4F 5280 bytes
font_01_sfnt_off00006d0b.bin
5c558618dff369c2b900462a2c05a26cd535293f5b4c043723e2c7e55145be0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 2884 bytes
font_02_sfnt_off00007917.bin
a818aabe30710b47af9c20da5fb95e27e581dc014ec7ad4c686ddb580234d7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7917 11936 bytes
font_03_sfnt_off00009edd.bin
c691c2dc236ff1c3149f8178f30dcb30456d959af2bd230901b395ad55359d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDD 16208 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.