Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aab2d2c5b17a6c0…

MALICIOUS

PDF

43.0 KB Created: 2020-07-22 00:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1392ea0b95e32edc94b6de39a26f7d22 SHA-1: 7ac56ed2ab5371f015f709211e04a762f4d238d9 SHA-256: 9aab2d2c5b17a6c00512b6c8e16879570162f0d850fdfebe2a7a937946db8b7a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document's content, though heavily obfuscated, appears to be a service manual, a common lure for phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed to redirect users to harmful sites.

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/wb?keyword=craftsman%20air%20compressor%20service%20manual
    • http://files.purpleinkpublishing.com/uploads/1/3/1/4/131437844/mikofoxaxomojope.pdf
    • http://files.ppscgc.com/uploads/1/3/1/4/131453132/towadexavoso.pdf
    • http://files.moesoap.com/uploads/1/3/1/8/131856188/2267339.pdf
    • http://files.myjazztrumpet.com/uploads/1/3/1/8/131872238/pibidasujiguleruvux.pdf
    • http://files.purplei
    • https://cdn.shopify.com/s/files/1/0437/3928/3608/files/12114868692.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/zaluwavuguboxopevafak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/1549411192.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://rekinirive.files.wordpress.com/2020/06/5988374424.pdf
    • https://bezizafutef.files.wordpress.com/2020/07/41867817974.pdf
    • https://nemujatisale.files.wordpress.com/2020/06/gilejabijatifuzugekexeso.pdf
    • https://mejenevija.files.wordpress.com/2020/07/27837479197.pdf
    • https://bujavam.files.wordpress.com/2020/07/52976730729.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1562/files/gewudifuxirutawekovopisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/lufuliwefaxivajoziwaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/4488/7963/files/96333663255.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/xaluzafabogexowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/fojel.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/pikosusowajiluzenusipefug.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/figexukupotodukowula.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_off00006a93.bin
9f3fb3cc53ed40f58c4a6a9f8f56673c590fb69988977a19a5754eb7a9ffaad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A93 5128 bytes
font_01_sfnt_off00007bf4.bin
8c6938ed4c9f93cda02a5d80c72f148770bb2b953d40272e08e05c531121f5e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF4 10192 bytes

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