Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e36b91e876186b…

MALICIOUS

PDF

38.4 KB Created: 2020-08-23 17:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b98138d10405e4b0d65ee0941b91ec64 SHA-1: 8d49e40de7c5c7a887b207e392b2d0b980cc03f5 SHA-256: 44e36b91e876186b1c5e118ac969d1f92fcf5fa5b9ccd0b13de6c34c83a697a7
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector pointing to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with the first URL being 'cdn.shopify.com/s/files/1/0428/4717/4812/files/nukodapomewavigipavikejaw.pdf'. The document body, though heavily obfuscated, contains text that appears to be a 'crabber 24 test report' and the malicious URL, suggesting a lure to a phishing or malware distribution site.

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.com/pify?keyword=crabber+24+test+report
    • http://files.how2productions.co.uk/uploads/1/3/1/3/131379830/77a25f40465cb7.pdf
    • http://files.staywhole.net/uploads/1/3/0/8/130813710/7115585.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/nukodapomewavigipavikejaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/avivamento_sustentvel.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/49063281168.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/perl_one_liner_regex.pdf
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/best_ebook_reader_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/64769337225.pdf
    • https://cdn.shopify.com/s/files/1/0428/8407/1583/files/list_of_regions_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/adaptec_6405_s.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/kulimazuxufovi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/potaduli.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_off00004d05.bin
a089870500265c865435700ac64b8185a2548d575231dca9267b0b3f2220fc45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D05 4796 bytes
font_01_sfnt_off00005d61.bin
1ad4b3e04039911973c52d2177773b828887ea163a3090fbfe7cdaf8bee250e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D61 9776 bytes
font_02_sfnt_off00007eec.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEC 4324 bytes

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