Malicious PDF — malware analysis report

Static analysis result for SHA-256 402332ff80456314…

MALICIOUS

PDF

39.1 KB Created: 2020-09-16 23:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb161a2fdd02008a645c8cf08f79a08d SHA-1: dc43fefdb45edb177ab1bfa79ce0ef357344b5b0 SHA-256: 402332ff80456314d63af3839792dbf79e57bc54dec045cd29af4e4724e55eb7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The embedded URLs, such as https://ttraff.club/wix?keyword=essential+question+for+opinion+writing, are likely part of a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=essential+question+for+opinion+writing
    • http://files.ecosphererestorationinstitute.org/uploads/1/3/0/7/130776295/sumamerako.pdf
    • http://pamamid.courtneygriggseportfolio.com/uploads/1/3/1/0/131070289/luxazolut-divoditufevogaz-wavisegi-miteronine.pdf
    • http://files.frontstreetfellowship.org/uploads/1/3/0/8/130873798/1485195.pdf
    • http://files.ladypositiveblog3.com/uploads/1/3/0/8/130873927/jitoge-polemebajesu-ginadetim.pdf
    • http://files.fieldhockeyfun.net/uploads/1/3/1/0/131070618/motejob_lokepem_doxes_nadirupa.pdf
    • https://7bc8c8c7-fc6d-4a78-93a8-db1ce07a8f4f.filesusr.com/ugd/296484_16a1842be7164f55a50a18c6c3528d08.pdf?index=true
    • https://963c18ca-421c-4fed-80f2-1e449c2b6999.filesusr.com/ugd/011e4b_cec88028449449e3ba736e168a33abc5.pdf?index=true
    • https://cf92d711-9384-4072-aa65-88106efd0559.filesusr.com/ugd/594ae5_e4bc5160906c47f080077b799be0e8b8.pdf?index=true
    • https://3ef5f571-b1fd-496e-858a-09b1fbb82240.filesusr.com/ugd/99b222_2df782434a754af28876c2b54ef3a571.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/36373329496.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/ampere_s_circuital_law_proof.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/46979239658.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/76695992493.pdf
    • https://cdn.shopify.com/s/files/1/0431/3104/4007/files/befikre_movie_full_hd_filmywap.pdf
    • https://34a7817b-735c-4ffd-932b-b9adafa83470.filesusr.com/ugd/e1d12c_ef1b9c509a4243c2bdf55203c190be29.pdf?index=true
    • https://9f1af481-5d09-4658-9c7f-b292b2cdd7ba.filesusr.com/ugd/9904c2_9a07a40480c3425d8e48cc9019f68193.pdf?index=true
    • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b35.bin
7725f9869e6764cb92436e94c04902321806e42917f18add1b9621dbb64a6ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B35 5244 bytes
font_01_sfnt_off00006d32.bin
80e671a278ee5e5b66c8e7ba7e851477eb25f6654a767c45e50102decc06dee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 10088 bytes

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