Malicious PDF — malware analysis report

Static analysis result for SHA-256 38eaa5710d66f940…

MALICIOUS

PDF

38.3 KB Created: 2020-08-22 03:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9800167c6bd6263ad340ef796150c8ce SHA-1: 039f646f2ba5dd136fbd7f17762f1999e48bd6a3 SHA-256: 38eaa5710d66f94006f2c18560a993a933ff84b4124dbe0292a5235edd6b2290
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious infrastructure at ttraff.cc. This indicates a social engineering attempt to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=caller+location+finder+apk
    • http://files.wordisart.com/uploads/1/3/0/9/130968921/2694075.pdf
    • http://files.ewiechart.com/uploads/1/3/2/3/132302913/gomokiwu-dapewijutufose-jofumuvusu.pdf
    • http://sixigi.yvhopheads.com/uploads/1/3/1/6/131607163/e0e43be5b869.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/free_ielts_reading_samples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/5074/4478/files/nufixexafexokuzokeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/bakalsk_prce_ujak.pdf
    • https://cdn.shopify.com/s/files/1/0464/8101/4936/files/bitdefender_antivirus_plus_2019_full.pdf
    • https://cdn.shopify.com/s/files/1/0462/6140/3802/files/animal_abuse_report_texas.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/que_es_un_contexto_social.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/aspire_3_a315_54.pdf
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/23645113404.pdf
    • https://cdn.shopify.com/s/files/1/0464/9114/0248/files/angry_hanuman_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0461/1997/7124/files/79782800753.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/las_brujas_de_eastwick.pdf
    • https://cdn.shopify.com/s/files/1/0431/3903/9388/files/twinkle_twinkle_little_star_poem_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/50848638531.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_off00005941.bin
07b5c9360a19c99cfa82a5c3b935ca3827621b187dc9ef3192268a27a6a7fc8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5941 4940 bytes
font_01_sfnt_off00006a1e.bin
559dd80b4c5cfa970188f0a99d61f85ead70439477439e6110386e746a8eb0ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1E 9980 bytes

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