Malicious PDF — malware analysis report

Static analysis result for SHA-256 87606675ac725119…

MALICIOUS

PDF

55.9 KB Created: 2020-08-30 06:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00dbae649b1659ecdc5a6fcc34944350 SHA-1: 807549b86bb532e859a547b150fbe9575224cc38 SHA-256: 87606675ac72511980d434420d14ef372c3936661110cc7165e9cf5b05895339
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain search-like text related to a product, suggesting a lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the PDF structure and malicious link are strong indicators of a phishing or scam attempt.

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.cc/wix?keyword=troy+bilt+tb110+won%2527+t+start
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/3826db_56558d1f01e2430282296b9e895f501b.pdf
    • https://static.usrfiles.com/ugd/ae059d_3107c856fa344625a7bc7134e3885210.pdf
    • https://static.usrfiles.com/ugd/b8c837_68a0f57776cd4fff9c020f98b8c7fc41.pdf
    • https://static.usrfiles.com/ugd/238140_55f89dafe793485c9266bea423c57530.pdf
    • https://static.usrfiles.com/ugd/e2b09b_06246f63e3b04624ae5e3d6a3ad3842b.pdf
    • https://static.usrfiles.com/ugd/837d34_1beff4e20eb845659e92360f44cde7d4.pdf
    • https://static.usrfiles.com/ugd/a48928_516ff31b27ee4b04886f36fcc4ed1050.pdf
    • https://static.usrfiles.com/ugd/49be48_8e1a37db9ee844adab792deeee071213.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/tivugus.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/guzora.pdf
    • https://cdn.shopify.com/s/files/1/0453/6886/9019/files/bible_apk_pro.pdf
    • https://cdn.shopify.com/s/files/1/0429/9060/0355/files/45889563042.pdf
    • https://static.usrfiles.com/ugd/93971e_10211e4b9fa44a098e6bdb8503faf26b.pdf
    • https://static.usrfiles.com/ugd/eda9ba_fee9743d8f03429f88aa1ae114ecaca7.pdf
    • https://static.usrfiles.com/ugd/02beb7_25294437d4e84813823976d2d61ff853.pdf
    • https://static.usrfiles.com/ugd/b8c837_18e68caaf3b145f0901fe5b2e1c1894d.pdf
    • https://static.usrfiles.com/ugd/b8c837_31a8c369cba9457ca7d3468049512af9.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_off00008f46.bin
3e8f1b578dcb8078926b788cda74d287e3aca0862a9047c67d592f07ece19177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F46 4860 bytes
font_01_sfnt_off00009fe4.bin
fa1fad17d7d6128d1fa72c6fca63823fd1198cea196345df8840d303c441327b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE4 10728 bytes
font_02_sfnt_off0000c415.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC415 4324 bytes

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