Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1efcf519346fb19…

MALICIOUS

PDF

36.3 KB Created: 2020-08-21 04:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d8c0865fbe643b270cecdcd93c226e SHA-1: 73dc6897154d3ec7655689c623bbd125225fb69d SHA-256: f1efcf519346fb19a2b1b785a201219c58a3da4997b1649d89215434f67705dd
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL https://ttraff.ru/pify?keyword=apr+performance+front+splitter 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 malicious URL 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.ru/pify?keyword=apr+performance+front+splitter
    • http://files.iridescentideas.com/uploads/1/3/0/7/130776206/vunovapux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datofugilasififuko.pdf
    • https://cdn.shopify.com/s/files/1/0464/5286/7240/files/reading_plus_answers_level_h_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/30342888412.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/dunawikojako.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/75662808510.pdf
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/33006255788.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/rewakafufijoxinoto.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005014.bin
4709da5c1d633aae6168d46a54ddde350b6a1d876dbbb3e490bdb92cabe13423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5014 5152 bytes
font_01_sfnt_off0000617a.bin
2223b82638e9ca4d80da2c420d3cf3eaa31cd011ba2d08615b1fe0bcaf33f37a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 10420 bytes

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