Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09343da622ce944…

MALICIOUS

PDF

287.0 KB Created: 2020-09-08 13:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12499312d9e0709ab0660d7a5ca6290e SHA-1: f765489c57af2685b3f7900e144cd4ffe90b6db7 SHA-256: e09343da622ce94498b3579730f14d25e092bc9c545bbfa26dbb05d5fd53d572
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=esc+dyslipidemia+guidelines+2016+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to this malicious site. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.ru/pify?keyword=esc+dyslipidemia+guidelines+2016+pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/53356239856.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/assembly_language_programming_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/5792/0677/files/towelapevewes.pdf
    • https://static.usrfiles.com/ugd/4cd51e_63dd603888e7434e87a8a557a7d6993f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4bbf5e719574c79bce01678a7fabdd6.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/67056900531.pdf
    • https://cdn.shopify.com/s/files/1/0435/7704/9247/files/rockshox_xc28_price_in_bd.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/72495008912.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/4858657509.pdf
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/public_relations_n6_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/adi_granth_sahib.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_off000410c4.bin
e8768f0a8a77c27043a8acc521bb65007151a308bdd9b1db644ac04fdd2b30a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x410C4 5920 bytes
font_01_sfnt_off000424f1.bin
f68a8e16707d6d745bb467098273ef9aa2b42d55bc8152350f34a9a2909f31c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x424F1 16552 bytes
font_02_sfnt_off00045874.bin
ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45874 16148 bytes

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