Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2462136c483166…

MALICIOUS

PDF

41.5 KB Created: 2020-07-21 09:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed12c5fec94b661b1053d8d7791ce10e SHA-1: 5fa1225f7eb4aa71904758cd78a61d1e98e5dbb2 SHA-256: 2b2462136c4831665f09a07f39dbdb2c63ca7f300b551a2feea29bfb47fd166d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external PDF links, suggesting a coordinated effort to distribute content or lure users. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to the malicious URL via the embedded link.

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/wb?keyword=creative%20outlier%20sports%20manual
    • http://files.salon218dayspa.com/uploads/1/3/1/6/131637038/zumibikekig.pdf
    • http://files.keepyourcoal.com/uploads/1/3/0/8/130874678/noloz_tujilisesakujin.pdf
    • http://files.belsondesign.com.au/uploads/1/3/1/4/131452950/mekevopijaf.pdf
    • http://files.belsondesign.com.au/uploads/1/3/1/4/131452950/mekevopijaf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/55420658848.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/gisunekopupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/8646398048.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/mixoto.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/33909291073.pdf
    • https://xoxedevomo.files.wordpress.com/2020/06/73218250125.pdf
    • https://lofipometif.files.wordpress.com/2020/07/46335643407.pdf
    • https://sufunitazot.files.wordpress.com/2020/07/luwezuxudaja.pdf
    • https://gigisidu.files.wordpress.com/2020/07/63577070574.pdf
    • https://guvaxasekiw.files.wordpress.com/2020/07/76710155088.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/65808479827.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/32642848743.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3008/files/mafaganepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25006313747.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/mukimogawipuvimamopiduzor.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/41665609201.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72438278193.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/nezamosedepojadasagomuda.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_off000065b4.bin
57ba6c6eb1bed993ef67ef51690af28d8efbe1d400f11c0a2800bcf3bc279926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B4 4932 bytes
font_01_sfnt_off00007665.bin
789f1201f8919b8b1caf3c0002eae7643d4fe8ff91cec231f1e60c0d0a3fef19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 9896 bytes

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