Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fdce5a96fb6f2a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-03 18:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1a9bed384d4f6afee4cfc9519a430ab SHA-1: 569af2ad385c2b96cb03d7d012efea0af54c8376 SHA-256: 09fdce5a96fb6f2ae88ef5ffb145356c5f6fa883674db11e1120eae059d03a40
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm infrastructure designed to redirect users to malicious content, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to distribute further malicious content or phish for information, likely initiated via a spearphishing attachment.

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.ru/pify?keyword=mass+air+flow+sensor+seminar+report+pdf
    • http://punezu.themovementdancestudio.net/uploads/1/3/1/0/131070722/keburimekigiseni.pdf
    • http://files.whitecloudvet.com/uploads/1/3/1/1/131164093/30cacf31a11c3c.pdf
    • http://files.rocktopiaacres.com/uploads/1/3/1/6/131606046/2722953.pdf
    • http://verunen.techandwisdom.com/uploads/1/3/1/1/131164312/sifune.pdf
    • http://files.doublehappinessllc.com/uploads/1/3/0/9/130969845/9549014.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/19978715580.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/16113717737.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9439/files/jibakakozuwolaxifa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/dodefarukawonutasiwiwepam.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/ford_f250_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0443/8137/2582/files/canon_mg3500_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/pemubodujutasiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/5702/0056/files/flask_file_upload.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/bloodborne_forbidden_woods_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/tojilemud.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/50335841194.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/wowupiligumusapoditera.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/zakakokuregevageman.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_off000071aa.bin
e14e2f1ac56235d8f938a8ec5ca32693e16eb8f5198858aeba3051ef26dc421e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 5284 bytes
font_01_sfnt_off000083a4.bin
25c6ef8dec307ff442b4b3c942de985ddad20565afc2d75bd037d301207c013d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 9992 bytes

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