Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be6628ca315ef74…

MALICIOUS

PDF

42.7 KB Created: 2020-10-26 20:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e4327f5e1f34ad74e27e6fadb5592ed SHA-1: c4cc5d725f34683673b8b5df510a4a6ee799f3c3 SHA-256: 8be6628ca315ef7474c7545a59946c3581ad8c9382d38812275ae0028ea823c0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 3

  • 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.
  • 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://gettraff.ru/pify?keyword=lab+puppies+for+sale+in+cleveland+ohio
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f9543fadfdeb.pdf
    • https://sodejokare.weebly.com/uploads/1/3/4/3/134349501/bavavame.pdf
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/8758575.pdf
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/8783893.pdf
    • https://zozolexiwu.weebly.com/uploads/1/3/4/3/134343356/6291762.pdf
    • https://luwiritogejoti.weebly.com/uploads/1/3/4/2/134266422/8709810.pdf
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5f944afae869a.pdf
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f8ea02530ac3.pdf
    • https://cdn-cms.f-static.net/uploads/4372740/normal_5f8d1a428757a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pazifetanegapu/adjectives_versus_adverbs.pdf
    • https://s3.amazonaws.com/jofunozuzof/ave_maria_caccini_chomikuj.pdf
    • https://s3.amazonaws.com/vavebufevodutob/98767691888.pdf
    • https://s3.amazonaws.com/gupuso/30444561136.pdf
    • https://cdn.shopify.com/s/files/1/0502/1155/3473/files/xuloja.pdf
    • https://cdn.shopify.com/s/files/1/0463/4473/2833/files/a_court_of_frost_and_starlight_read_online.pdf
    • https://cdn.shopify.com/s/files/1/0500/1307/7662/files/twitter_apk_for_tencent_gaming_buddy.pdf
    • https://uploads.strikinglycdn.com/files/b8d9a25d-7e94-47d5-8d06-bf8e54b474fd/82386097916.pdf
    • https://uploads.strikinglycdn.com/files/223cfe6d-1a96-4695-bacc-42413441c3c9/29171736822.pdf
    • https://uploads.strikinglycdn.com/files/c0e58130-2c0d-47b5-9930-086c53de59ef/42184623936.pdf
    • https://uploads.strikinglycdn.com/files/fd14d2f7-2dd7-48d5-a1b2-bf8d15ebeeef/21407489061.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e90.bin
c44890a3577c29977dee8d99cc84288749fa7d8d74c88b129624354ed71214c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E90 5184 bytes

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