Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2cbee894dc4d35…

MALICIOUS

PDF

40.8 KB Created: 2020-08-05 15:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4ff7e514001bf65fcc26e32af15c96d SHA-1: 291e1e03677995d5fae36fd82ae563b403ccfb72 SHA-256: cc2cbee894dc4d35578cf37b52e53e263e284579e0d5f8e3c9199c909855fdb7
150 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 high number of embedded links, many of which are to external PDF files. One critical heuristic indicates a malicious redirector link to 'ttraff.ru'. The document body contains garbled text but also includes the malicious URL and several benign-looking Shopify URLs, suggesting a link farm or redirection tactic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=cicely+berry+jaw+exercise+pdf
    • http://files.foresideandalusianstud.com/uploads/1/3/0/8/130813764/muwif.pdf
    • http://files.davidlouismarino.com/uploads/1/3/0/9/130969800/1599969.pdf
    • http://files.animals-pro.com/uploads/1/3/0/7/130776647/mipig_pixek_nonuzepebev_suzanuzodog.pdf
    • http://files.joelewczuk.com/uploads/1/3/1/4/131437655/leregox_jexik_sedaninube.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/zopifowakepetifepaxasaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/2030601471.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/il_canzoniere_di_francesco_petrarca.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3829/files/rigopemevijodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/bebipofasawigup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/valuzaxuwimowuxenav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/97437007575.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/fuderanibevuzomijuvage.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/kadamuzaka.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/
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006052.bin
736d4530d5709c92dceab5d635b01c8fa921658861d1e68abfbce277df50a2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 5532 bytes
font_01_sfnt_off00007349.bin
9daa85602e72d7763698364203643a37253e960d9c06839c473066092c99d7d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7349 10196 bytes

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