Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5cc585b1b09e0c…

MALICIOUS

PDF

47.4 KB Created: 2020-08-09 09:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36bbb90c582518916de16094fff9ea33 SHA-1: 3811bb4c19bb508fbb596b419033d300b0fea564 SHA-256: 1e5cc585b1b09e0cbfd786d5a1d40ed7caa486ce7a3686253789a274b81e2df5
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to file conversion and the malicious URL, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious redirection.

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.com/pify?keyword=convert+cdr+file+to+pdf
    • http://files.magickc.org/uploads/1/3/1/6/131607093/fazut_nibube_pereriwaxoxefe_budevaw.pdf
    • http://vavalejag.oasispoolsupply.com/uploads/1/3/0/9/130969744/9426150.pdf
    • http://files.frhistory.com/uploads/1/3/1/4/131410479/9069471.pdf
    • http://files.asianhorizonltd.com/uploads/1/3/0/8/130813055/begavap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7700/0611/files/wozepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/80128166633.pdf
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/puzurukaselizaxub.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/wuwaxegikusiwiwof.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/wosapamukogubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/wisifuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31240515614.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/binsey_poplars_poem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/mnemonic_dictionary_gre_wordlist.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2646/files/desamepinesanor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38138836364.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_off00006335.bin
bd3008cca951cfb2d973cc324636b7e0b17b2e8601c7321ba59fe6b37a450bbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6335 4728 bytes
font_01_sfnt_off00007361.bin
efb14b193807c36b53efce444360cf75a588f99e108f706190ae8422e86e944c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7361 14180 bytes
font_02_sfnt_off00009bb8.bin
9d161d6e34f835aff196e226d852edde4d65b072a4902c32411b177d8c29261e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB8 16076 bytes

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