Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3bbbe330c5748e6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-07 15:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baa6094304997459ab5b23d642b55e7a SHA-1: f6379b65d231d7a45a67a4eeb49b0c175013358f SHA-256: b3bbbe330c5748e6ade8e66d876d233a7fb214f063ed49d5a9d34000217a3c72
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and several other PDF URLs hosted on various domains. This suggests a link farm or SEO poisoning attack designed to either distribute malware or phish users.

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.ru/pify?keyword=abordagem+quali+quantitativa+pdf
    • http://xikokuka.dthaikitchenthornwoodny.com/uploads/1/3/2/6/132681670/52cd3ea.pdf
    • http://files.jjamtech.com/uploads/1/3/1/6/131636692/ketusikowe-xetodila-xavapilibu-kazadutuvofu.pdf
    • http://files.newlightink.com/uploads/1/3/1/3/131383821/1e9cf.pdf
    • http://files.episcopalchurchredding.org/uploads/1/3/0/7/130776521/5247769.pdf
    • http://files.cynthiamade.com/uploads/1/3/1/4/131483955/fodibulupezejamavuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/kisigomew.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/41162091551.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/fagoxodogewajeziron.pdf
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/fapirixebubesot.pdf
    • https://cdn.shopify.com/s/files/1/0452/7095/8241/files/biliary_tree_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/pigiredekonesalijapagawej.pdf
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/architecting_modern_data_platforms_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/abc_colouring.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/pikeregivegobikup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/berefafurigo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/7024285717.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_off000068ee.bin
edbd2b48284995ba519c91d7bc0463f5065bacfc1509123b7d436f8cf09f1458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EE 5496 bytes
font_01_sfnt_off00007b89.bin
3d67fb9a523e365f92a7a8b754cf36688015d2347c62425cd0a7207a5586b194		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B89 11744 bytes

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