Malicious PDF — malware analysis report

Static analysis result for SHA-256 06446672aaa60869…

MALICIOUS

PDF

44.4 KB Created: 2020-09-15 04:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0110e3f13b3c774a441df5478952a284 SHA-1: c6aaf1d6ab258b4e116277384be58c9a7761138e SHA-256: 06446672aaa6086991aca97b413d3cff6e6d10ac3fc65dec4e836f7099aea790
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, suggesting it is part of a link farm designed to distribute malware. The document body contains text related to downloading FIFA 17 mobile, and a call-to-action button lure is present. The ML classifier also strongly indicated maliciousness.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=download%20fifa%2017%20mobile%20apk+obb
    • http://files.blakemoreart.com/uploads/1/3/2/7/132741023/b32baafb.pdf
    • http://fezezogim.cambridgesupervisiontraining.org/uploads/1/3/2/6/132681337/divef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6116da_32359acd10eb4ec0bdebd9de16cd5468.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_538f036943a4479a968338075fc0d0fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_df685358f3244444b989f5a7620b5a96.pdf
    • https://static.usrfiles.com/ugd/135178_a29cb62e95074ef88715421986685bfd.pdf
    • https://static.usrfiles.com/ugd/6846fe_66b5761cd99a49c286ac4a4cf844a065.pdf
    • https://static.usrfiles.com/ugd/479fa9_c0bdfd558e994b2c95677e7de928b7b3.pdf
    • https://static.usrfiles.com/ugd/55f640_2361873f175d4609bd5cecabebea6c90.pdf
    • https://static.usrfiles.com/ugd/7ae8b3_5532564a5385494cafc5f65079d4c706.pdf
    • https://static.usrfiles.com/ugd/b65acf_87a9c43440454f1cbcddcf581402aee0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f101c65fa2fe4cafa78c193f6aab79a0.pdf
    • https://static.usrfiles.com/ugd/d90490_d5ab342aecf7436c9ade3047e735c6af.pdf
    • https://static.usrfiles.com/ugd/d162e3_0b562e376fc346faa9c26a64a108579a.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_off00006711.bin
53a9bd4eb55873e9e0fbc406c8d9b68eed09f1473599f0861d2808c90ac5f301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6711 5340 bytes
font_01_sfnt_off00007950.bin
68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7950 1796 bytes
font_02_sfnt_off000081db.bin
652a399723fcde523039540aa3e4f49f87ae5771c55a2e0c2ce1eadeb24ce3eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DB 10132 bytes

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