Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abe7ec83762ad12…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 05:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ceea67cf269272183b0b58ba455cf8 SHA-1: 645d27e8b834ddcacfcad99c64d9927eaae15330 SHA-256: 5abe7ec83762ad1225f6ffdaff68fe4c586e54d48f71a4d24d998f7d061b75ae
154 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 a redirector infrastructure. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains text related to hospitality industry management and the malicious URL, suggesting a lure to trick users into clicking the link.

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=hospitality+industry+managerial+acco
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/gelok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/challenging_worksheets_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/41957111923.pdf
    • https://cdn.shopify.com/s/files/1/0435/7269/1099/files/aladdin_2019_prince_ali_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3084/files/24671017196.pdf
    • https://static.usrfiles.com/ugd/b8c837_215ee62a3a1148b38f0730dcae6314dc.pdf
    • https://static.usrfiles.com/ugd/856cea_0de970aeed15446ea6395cb4e140e0be.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd215cc5a463431297677abf86822acd.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bce332ee5b64ffbb48fa358c04ce955.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89788869c5943fcbffa2295ffcc492d.pdf
    • https://static.usrfiles.com/ugd/6cfc61_e9af91f7f14742139a208983f3ca40e1.pdf
    • https://static.usrfiles.com/ugd/b972d5_8af36a07c59b4c71966c444a60dc9f05.pdf
    • https://static.usrfiles.com/ugd/b4a829_9db135299bc340ee975501f4663fd551.pdf
    • https://static.usrfiles.com/ugd/5ed537_7d29c9a7395f4ed3b9f6a51b9b16a186.pdf
    • https://static.usrfiles.com/ugd/9e53d4_50c0a8e3f32343719cb56af93e2307ba.pdf
    • https://static.usrfiles.com/ugd/83f04e_c6265df45c864e66bbc3bb7ea284a87c.pdf
    • https://static.usrfiles.com/ugd/97368a_f00538f92288435a8382e18ce021a5df.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005950.bin
b6c0bd4fa3884003d3e8bb1f34ed3cbaa84e40978c9bed684b8ab25b1f96ee0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5950 5456 bytes
font_01_sfnt_off00006bc9.bin
dcec20f7132b527e34a40daf458230380f48a88058a950f9c53ca7cf04de9809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC9 10276 bytes

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