Malicious PDF — malware analysis report

Static analysis result for SHA-256 1017f30b88939301…

MALICIOUS

PDF

47.4 KB Created: 2020-09-13 07:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5188473ecabe7ab20a14775c78bfc949 SHA-1: b2e0c337a011e1d19b990cf31815717655d0e2c1 SHA-256: 1017f30b88939301dcb5d91f2550052f413b09c4d81edf3ce243a9af4763594b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting a broader campaign to distribute malicious content or engage in SEO manipulation. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=histology+worksheet+pdf
    • http://xopabud.pantheradesigns.com/uploads/1/3/0/8/130814010/fufosoxumumoma.pdf
    • http://fodeti.nigelgorskiconsulting.co.uk/uploads/1/3/0/7/130775565/7805eb6002.pdf
    • http://files.ameritexmovers.com/uploads/1/3/2/6/132695543/31ec44acec.pdf
    • http://files.aparkerdesigns.com/uploads/1/3/0/7/130776757/punakapowaxedek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/problems_on_payback_period.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/87599178134.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/free_download_aviation_english_for_icao_compliance.pdf
    • https://cdn.shopify.com/s/files/1/0440/0293/4942/files/ashley_madison_email_list.pdf
    • https://static.usrfiles.com/ugd/cd79e3_3a7e67da76cb459dbe7c158adc2f8dcf.pdf
    • https://static.usrfiles.com/ugd/5cf23b_480f8fd8ba3b4c048e96e30f72b617c9.pdf
    • https://static.usrfiles.com/ugd/ba3095_4ebeaee2f9544468bd1a9f9f84ba390b.pdf
    • https://static.usrfiles.com/ugd/a2e20a_7473fee4a639463d9bff13faba20863e.pdf
    • https://static.usrfiles.com/ugd/974a4e_6091078dec1546e1be5ce2b7863ee2e6.pdf
    • https://cdn.shopify.com/s/files/1/0464/8294/8264/files/rotikimofefojewalegowazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/auditoria_administrativa_alfonso_amador_sotomayor_descargar.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_off00006cab.bin
c76abba7273bdaaf576dd9fac08f86be8f3cbc8dba66bad9305211492e0edbdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 4996 bytes
font_01_sfnt_off00007dd1.bin
a9c7ae3cc4a3f175fe4838baea7368fa8944acffa871b2ee1824c46aa4d31e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD1 10964 bytes
font_02_sfnt_off0000a2c0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C0 4324 bytes

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