Malicious PDF — malware analysis report

Static analysis result for SHA-256 102ebc88625d9079…

MALICIOUS

PDF

45.7 KB Created: 2020-07-31 20:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da09c54b2845961a53ebbb649eb03fca SHA-1: f4a3d228d2096ae0cf3729c89de6fc154ad54973 SHA-256: 102ebc88625d90799669d78c2de8a1ef1b089b299d84fc16f2c4932bb0f69ccf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'leblond lathe manual pdf' and a URL that appears to be a lure. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a malicious redirector.

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=leblond+lathe+manual+pdf
    • http://files.sayn-wittgenstein-piraccini.com/uploads/1/3/0/8/130873875/1159760.pdf
    • http://files.araliaonline.com/uploads/1/3/0/7/130739204/6174046.pdf
    • http://files.emericservices.com/uploads/1/3/1/6/131607075/jizilugu-tavawosow-bigudonofijozem-fuviduf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6286/1730/files/79721265876.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/64097559856.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/myred_unl_edu_blackboard.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/fifuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/65611086554.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/menimawevivijisitira.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/filumukadusigewabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/lujisiramibalirafej.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5789/files/30854813642.pdf
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/29882828742.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/webataxanukalogesupufuko.pdf
    • https://cdn.shopify.com/s/files/1/0430/7461/7511/files/dixojowanodi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/37063781879.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067de.bin
1d868adaa527ffaf0af92b190d642469c8795d15df0e1a9c005e517120ce6a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DE 4924 bytes
font_01_sfnt_off00007871.bin
8c7b8b6236c1aa9281f48d0170b0d800565a64e5efaf192fc94f21f0acc06bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7871 10376 bytes
font_02_sfnt_off00009bba.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBA 4324 bytes

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