Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4af30986fcdc68…

MALICIOUS

PDF

48.6 KB Created: 2020-09-01 02:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f4c906895d0744cbfb33b80b15bc2f SHA-1: 7f1dad0efb5048f1fc02517aebbcec8dc9ad74bf SHA-256: 0b4af30986fcdc68046d8e75193772158fc6f284a075d0cd867a4a0585898a61
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=char+dham+yatra+full+movie', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other benign Shopify links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=char+dham+yatra+full+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/24365731430.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/free_download_adobe_acrobat_edit_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30740110423.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/97112706098.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a8e558f2e084f9bbdb3e8fb9e034ad9.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc3e5999a7de4cafb3d8ed7e44dd68bf.pdf
    • https://static.usrfiles.com/ugd/0aab01_d0860360db044d0696e7df9734d16a5b.pdf
    • https://static.usrfiles.com/ugd/bb13a2_aab690ce152647eb9a55d1c76193bbb9.pdf
    • https://static.usrfiles.com/ugd/ab922d_b0841f3bf0c9447f842efa36a1f80499.pdf
    • https://static.usrfiles.com/ugd/e2c250_60f03a5e3f494be9abd03ebff57c83b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_43deaa3efff0478aaac26c00240fc6a9.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_29562606eda1433a9f4ac5967dfdfab7.pdf
    • https://static.usrfiles.com/ugd/1decf9_46b9a6445c7e4fb399762b30a30346e1.pdf
    • https://static.usrfiles.com/ugd/909b15_cd59139c98d74e6896368d0584f8c8ee.pdf
    • https://static.usrfiles.com/ugd/9b5f63_c42b5dad8d3244beb31b3dbac3e7948b.pdf
    • https://static.usrfiles.com/ugd/0d089b_863960567f84495886d62ab1a9b38c0c.pdf
    • https://static.usrfiles.com/ugd/3b7182_85fdb3232c004be8a38fb1c7dd071686.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000765d.bin
2930e4748f04c40afef7130317ca0fd6923637dc0d21c5e5f3effb8eae1ce3fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765D 5036 bytes
font_01_sfnt_off00008756.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8756 1936 bytes
font_02_sfnt_off00009099.bin
0279cd578389fb68a491adb7c6f088c082ddb92370970e6b335a245745ee1dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9099 10756 bytes

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