Malicious PDF — malware analysis report

Static analysis result for SHA-256 47928ae566f1afa6…

MALICIOUS

PDF

40.0 KB Created: 2020-08-24 08:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27ce5639d6ecb296d2389b70c8de6de3 SHA-1: 9a5bb67a3ec575bd5ff040fad2b0cb2dc0ede945 SHA-256: 47928ae566f1afa67f46de3ab4ca3e594041552bf88ee7440d5da1586dc4cd3f
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Publication 550 pdf' and includes the malicious redirector URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=publication+550+pdf
    • http://tugatese.sueayers.com/uploads/1/3/1/3/131383309/2559342.pdf
    • http://files.avikw.com/uploads/1/3/1/8/131871864/bavurifokonesoguruv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9975/files/lezikenaxewolaze.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/kifatusemumux.pdf
    • https://cdn.shopify.com/s/files/1/0437/3010/8581/files/kangan_song_ranjit_bawa_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/pearson_pre_calculus_12.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/xonafedokuzoribabudesibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3271/files/direfuzuwemofavuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73633131036.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/88105125225.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.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_off00005ee5.bin
f04f82569d5fc3aa4af467e7be2b2d1b9f2a353021b404cf4a5f5d50a8cef422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE5 5280 bytes
font_01_sfnt_off000070e8.bin
e36228228365e679a88b2b4c552087f4930b7a6bca9fc31aedffff8c202cef35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E8 10192 bytes

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