Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2c63dfa9c7c483…

MALICIOUS

PDF

45.4 KB Created: 2020-07-09 08:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb7d72ba505eb7872ef1bb419371d642 SHA-1: a9aab604c0f75e87203e8e1a73dbf720128be221 SHA-256: 1e2c63dfa9c7c48343f4ddee422fabd51bb31c8aa5cd392e3b778ead764132a8
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many of which point to external PDF files. This is indicative of an SEO poisoning or link farm attack, designed to lure users to malicious content or compromise search engine rankings. One critical heuristic identified a link to known malicious redirector infrastructure.

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.ru/wb?keyword=ohs%20physical%20requirements%20manual%20handling
    • http://files.pipemanstudios.com/uploads/1/3/0/8/130813546/sipuluvobika_gewepet.pdf
    • http://files.doralcardiology.net/uploads/1/3/1/4/131437362/eff9f5cc150e972.pdf
    • http://files.insectcollective.com/uploads/1/3/2/6/132683484/tiwewasa_katevubevadake_jilamuxawum_mitugujufa.pdf
    • http://files.global-migration-of-african-cuisine.com/uploads/1/3/0/9/130969435/1734317.pdf
    • http://files.friendshcls.org/uploads/1/3/1/8/131871467/6a03116cf28c.pdf
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdf
    • http://files.thecoderecords.com/uploads/1/3/0/7/130775134/5389704.pdf
    • http://files.theyogaschoolny.com/uploads/1/3/0/7/130775942/668541.pdf
    • http://files.spotlightseniorservicesnorthernarizona.com/uploads/1/3/0/8/130813409/b5d2688cbaae7c.pdf
    • https://pedonatip.files.wordpress.com/2020/07/94785048374.pdf
    • https://febibofopas72304249.files.wordpress.com/2020/06/vaxipimawazipabir.pdf
    • https://rexukoxaz.files.wordpress.com/2020/06/manepifibajirin.pdf
    • https://talugunika.files.wordpress.com/2020/06/30621137752.pdf
    • https://wifuxew.files.wordpress.com/2020/06/dixariwimonakasazuvubaku.pdf
    • https://mixisimukagi.files.wordpress.com/2020/06/wefikijilekame.pdf
    • https://lixemam.files.wordpress.com/2020/07/jixagotodamenajop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.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_off00007381.bin
1ea417c0e22fa9cc1b0af88bbaaadfb1438e5296359aa56a1245b87ae54d62be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 5516 bytes
font_01_sfnt_off00008615.bin
0139917ed6464fe9422412cc240d42800a2eb862fbc2eb7fa980bf17501e7285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8615 9908 bytes

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