Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f2accca15b7911…

MALICIOUS

PDF

51.9 KB Created: 2020-08-21 17:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fce14fa811ae4bc4f8f01d722eb7a358 SHA-1: d429ef5ecdf927dc812d88dec2e90ba9cbf4fe76 SHA-256: 07f2accca15b79114dde4be9f561187231c84fe3b1e6cb7334631d7060d8efa4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search results or distribute further malicious content. No scripts were extracted, but the document's structure and embedded URLs point towards a phishing or SEO manipulation scheme.

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/pify?keyword=cpm+ebooks+integrated+2+answers
    • http://lomikiz.joshuahousenek.com/uploads/1/3/1/0/131071181/a734641.pdf
    • http://files.panduhm0n1um.com/uploads/1/3/2/6/132696122/jinupira.pdf
    • http://files.salemll.info/uploads/1/3/1/3/131379321/jawovolasaxibixuka.pdf
    • http://files.littlesilverems.com/uploads/1/3/2/6/132682989/guguta.pdf
    • http://pidosak.logansyndrome.com/uploads/1/3/1/4/131408738/mowojekaxotag_fesawofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/tinkers_construct_durability.pdf
    • https://cdn.shopify.com/s/files/1/0431/3641/7953/files/hunter_programable_thermostat.pdf
    • https://cdn.shopify.com/s/files/1/0435/5696/2467/files/lulukolidobidolip.pdf
    • https://cdn.shopify.com/s/files/1/0432/1964/8680/files/compare_numbers_worksheets_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/jazemot.pdf
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/xoveragitipakemavenez.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/free_child_consent_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7250/files/waleravesepegipepolaloro.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/towaruw.pdf
    • https://cdn.shopify.com/s/files/1/0440/7063/3624/files/91538305890.pdf
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/18759344649.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/20728318463.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_off00008345.bin
ccc7ddedd748936430a93d19c964bc665723f1ab7ca3c811f66808d81728c110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8345 5580 bytes
font_01_sfnt_off00009633.bin
60e5183e41bbe4e28bc8ba9eead3bf659fdf49ce3b6325596770cb8c3138ce29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9633 14300 bytes

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