Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0799300c5e914a…

MALICIOUS

PDF

39.6 KB Created: 2020-08-17 15:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb8206553fb4262b3b5a7ba738b18418 SHA-1: adab5ce58b958f4c94e43a8c590a165a39907e88 SHA-256: 9e0799300c5e914a3234b87834f1acb94b17d6f8d0f959c9f208052993b5d083
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains a link to a known malicious redirector. The embedded URL, https://ttraff.cc/pify?keyword=factoring+trinomials+practice+worksheet+with+answers+pdf, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and the redirector link strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=factoring+trinomials+practice+worksheet+with+answers+pdf
    • http://files.nishidaexpress.com/uploads/1/3/0/7/130739069/2323814.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/guvoluwetupipi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6450/9094/files/24555232075.pdf
    • https://cdn.shopify.com/s/files/1/0440/2220/2518/files/63569632794.pdf
    • https://cdn.shopify.com/s/files/1/0435/8530/6782/files/mcdougal_littell_algebra_2_practice_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/zavugadomalon.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/sony_rx100_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/2019_espn_fantasy_football_rankings_cheat_sheet.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046e2.bin
c8477685beb4d416c61e393ce6d26e3b9eda47e81dc54b855f98e1aea28da2b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E2 5468 bytes
font_01_sfnt_off0000595b.bin
df10130cbcfa1d2e64449e800c7538f821214944f303a00a264b92f577e3b339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595B 13280 bytes
font_02_sfnt_off00008380.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8380 4324 bytes

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