Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8279fb653ab065e…

MALICIOUS

PDF

48.4 KB Created: 2020-10-17 20:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0397b159803e12705526ee7a643e9eca SHA-1: 9a140a13af30bbb07fc96e0979e917cfe9165af0 SHA-256: c8279fb653ab065e80c875dda7b56a2270745f4ec8c53aeea10a9a0fb0acfdf6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though partially corrupted, includes the same URL and references a password-protected archive lure, suggesting a multi-stage attack. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent, likely for phishing or malware distribution.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?keyword=jeux+de+mots+en+fran%25C3%25A7ais+apk
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f89398713f9f.pdf
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8a20101e2f7.pdf
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f882367ecefa.pdf
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f8749ffbf7ab.pdf
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/5387279.pdf
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/5271450.pdf
    • https://xemifedawunata.weebly.com/uploads/1/3/0/7/130775780/ddab4628fb.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fibaxizimudez.pdf
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/7953257.pdf
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/4a96f8a2da.pdf
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/6924687.pdf
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8850f37445f.pdf
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f8a8cebb32bd.pdf
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f8a84fdbaaf8.pdf
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f890c3af295d.pdf
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8ad530c13e7.pdf
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/vopamon.pdf
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/1135241.pdf
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/556f9f6c666855.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0486/0153/0526/files/xewexizevorifopapi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/35533324091.pdf
    • https://cdn.shopify.com/s/files/1/0483/4797/1735/files/grand_view_farm_forest_hill_md.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/53357233781.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_off00006b90.bin
943d51d38d3b9f7f21e59c7eb424c38c028a0e5f0234bafbca2822626fbf8bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B90 5340 bytes
font_01_sfnt_off00007da7.bin
ba6d477349c8633fd1f810a83a0c9fed775f1699348b86b4d0fe93525445ee3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA7 12108 bytes
font_02_sfnt_off0000a404.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA404 4324 bytes

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