Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b329c9d3a88dcb9…

MALICIOUS

PDF

48.4 KB Created: 2020-08-25 23:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5149ce11028517958b798e7baddc9afa SHA-1: 0885abf272a746c3178c32558f1d1410f964463d SHA-256: 5b329c9d3a88dcb9852cfb38fca165913b3702deb546aad24f4802eadfd93ac9
154 Risk Score

Malware Insights

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

The PDF document contains a link to a malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body and embedded links suggest a lure for cracked software, specifically mentioning 'Coreldraw 2018 crack for mac'. The presence of numerous external PDF links, as flagged by PDF_SEO_LINK_FARM, further supports a malicious intent to distribute potentially harmful content or lead users to malicious sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious 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.club/pify?keyword=coreldraw+2018+crack+for+mac
    • http://pedix.hulahula.org/uploads/1/3/1/4/131406436/nagenowig.pdf
    • http://xuralo.38plus2productions.com/uploads/1/3/1/3/131398177/nejuwisugobad.pdf
    • http://files.testsuccesspodcast.com/uploads/1/3/1/4/131437756/zajepo-logavesub-ganetokolaz-josomalesobula.pdf
    • http://files.bbq4hope.com/uploads/1/3/1/3/131383512/b997e2ac51bb1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/acids_bases_and_salts_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0406/files/economics_for_managers_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/bulazideves.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/46010879104.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/79964783226.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/werekegemunezurazagulif.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/multiplying_decimals_worksheets_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/22907218716.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/fusavokavejuwuwosazefido.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/43137602834.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/dibafuxuzunebulefodis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e4b.bin
5f91b11c373fcc30468daeffb12c5b816077ac281375cd97b9fe23bee566d94c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4B 5572 bytes
font_01_sfnt_off00009141.bin
905bdb12172fd8197e978f27723551bec35c5d578cdc50142b26eecd22886b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9141 10364 bytes

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