Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb904165f5305c0…

MALICIOUS

PDF

40.1 KB Created: 2020-08-15 04:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbff7dccec0d14d5f9f4555f7d00fcef SHA-1: 30d64322f3b05b4d4f06bfc93fbd7402e42242af SHA-256: 2fb904165f5305c04c50f4e799f546c353b6c51d04cd656d1b5134c302ab34f0
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Fuji gi size guide' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely part of a link farm to improve search engine ranking for malicious content.

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=fuji+gi+size+guide
    • http://files.schreinerarbeitenbuechler.com/uploads/1/3/0/7/130775084/bikozaz.pdf
    • http://files.msdengineers.co/uploads/1/3/2/8/132814048/jateja-dawon-jegajod-dodowokuzab.pdf
    • https://cdn.shopify.com/s/files/1/0434/4152/0790/files/xekixen.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/56864807776.pdf
    • https://cdn.shopify.com/s/files/1/0432/3177/2835/files/judemazafazejetital.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4220/files/davepijirudobepasiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/girux.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/74840347430.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2454/files/sample_abstract_reasoning_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duliwoledemovaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5053/9940/files/lifitobexifekasike.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/adobe_printer_free_download_for_windows_7_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3367/files/66775973791.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_off00005f3b.bin
41ef0574ae22013130d62bf7625a344c27017c720cfbcae4a318b89d2cd3f8e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3B 4736 bytes
font_01_sfnt_off00006f7a.bin
5f471c968aad2a52f33d10c4ee2e6cded2df0c45ead0f576057ab63a24dc8bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7A 10796 bytes

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