Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc94daac084dfbd…

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 16:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5c3c2d6eb5f8b6995314dc4951b3b1a SHA-1: 591b798fc7f4ad7400d83d12ae35e1bdb4715e79 SHA-256: 7cc94daac084dfbdd4ca2cd5a5e919107446ed0c1ee6ebc06340c1a91a5338ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to movie streaming, suggesting a lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm, likely used to obscure the malicious redirector.

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/wix?keyword=sarkar+3+full+movie+watch+online+fre
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/45689897473.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/benim_hocam_tyt_video_ders_notlar.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/pukeko.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/numeros_romanos_del_1_al_100_completos_en_orden.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://static.usrfiles.com/ugd/b8c837_099574f3ea9541caa72edc3b0b0028f2.pdf
    • https://static.usrfiles.com/ugd/a76634_45ae6fe0b3c84b149fa4388097e9ba66.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ec5582f6daa44069867a827a3021dab.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0774/files/47729911504.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/1407396520.pdf
    • https://static.usrfiles.com/ugd/bae363_aa445160277845959cc14333cde6afc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2b96ae9efea49cda02753a74a29d5b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b50bcbcf018438aa93353c7cc087134.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7296acb0af54d35b68dce431d1b1e90.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a5b.bin
6a11b220bd82f0dff528c655be57557d492b75a89175e4aa9c97f995573d015e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5B 5424 bytes
font_01_sfnt_off00005cc2.bin
fa6e935ce703461c662c7ef16dd4897baf06f9daf903d2cfc2f49c34421bff26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC2 10016 bytes
font_02_sfnt_off00007f3d.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3D 16164 bytes

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