Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b6ad269fb2fb4a…

MALICIOUS

PDF

42.4 KB Created: 2020-07-21 22:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c7f558b21a1648ff034ab90f13d1f66 SHA-1: 22c8ff2100fa8f51287ef77d2e2c73c9f1e40924 SHA-256: 32b6ad269fb2fb4ada05e2e9b9c1ea6aa4d22798db1c26fba0d931b9c27e64aa
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=pendidikan+agama+islam+kelas+xi+kurikulum+2013+pdf'. Another critical heuristic identified a large link farm pointing to external PDFs, with 'https://cdn.shopify.com/s/files/1/0435/6079/6318/files/foruxijaj.pdf' being the first listed. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to educational material.

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.com/pify?keyword=pendidikan+agama+islam+kelas+xi+kurikulum+2013+pdf
    • http://files.ftkingchurch.org/uploads/1/3/1/6/131637570/vaxan_vosugenoduwamem_lesida_benarujori.pdf
    • http://files.independencetelevision.com/uploads/1/3/2/8/132814147/8137547.pdf
    • http://files.jindabyneyabbies.com.au/uploads/1/3/1/4/131409098/34a647e31.pdf
    • http://files.heartoftheprovider.ca/uploads/1/3/0/7/130775106/888f622b05e8a1.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/foruxijaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/pemejugukubumud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/pupojiwegu.pdf
    • https://xozigun417683795.files.wordpress.com/2020/06/36266976285.pdf
    • https://fizedetaz.files.wordpress.com/2020/06/5451725890.pdf
    • https://kepedizav.files.wordpress.com/2020/06/furomekilej.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/manosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1782/files/80887058758.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/5350594465.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/98524011968.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/35768675370.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_off0000665f.bin
08f9dbdb4cb42749bad5d6564c5d2f7d070bf5715f3d46bf4dceb0a7b4d161e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x665F 5676 bytes
font_01_sfnt_off00007988.bin
784d52c65d4d71c5da81c52b70bbef717215f41e42061b7f7be399b6174f9837
pdf-font-stream PDF embedded font (sfnt) at offset 0x7988 9972 bytes