Malicious PDF — malware analysis report

Static analysis result for SHA-256 1806dd9dfd145828…

MALICIOUS

PDF

47.3 KB Created: 2020-08-07 01:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a4b6c46744aefba01f7e66d7c933f10 SHA-1: 1aa107fa6ce2e770226e6b2e34e0236223314073 SHA-256: 1806dd9dfd145828ab2ba993c4cdb4a7a8bb98474e172fb8752dcf56abe4ed2b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious objective. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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/pify?keyword=general+zoology+pdf
    • http://files.spoton-marketing.com/uploads/1/3/1/0/131070212/lagoturodupo.pdf
    • http://files.northwestchurchofchristchicago.org/uploads/1/3/1/0/131070124/e9eb362d.pdf
    • http://files.trvsclothingcompany.com/uploads/1/3/0/7/130776724/lixitikejifeve-vadese-suwili.pdf
    • http://gopuzu.eastbayayurveda.com/uploads/1/3/1/4/131453540/zubabolapiretud-pisadezukup-xolodixisego.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/pexuteviluruxogenazuzudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/56183990552.pdf
    • https://cdn.shopify.com/s/files/1/0449/0670/9159/files/iodine_value.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5149/files/abrsm_theory_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/dejewone.pdf
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/63337297777.pdf
    • https://cdn.shopify.com/s/files/1/0445/5242/1535/files/arabian_nights_aladdin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/14202189020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/posax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/1335615855.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/kumon_2nd_grade_math_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/active_release_technique.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_off00005f97.bin
8ad98bf2420a2a042a5e2b96dea632b2645fb37d962870f8affd7430dd8da489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 4872 bytes
font_01_sfnt_off00007043.bin
511874886714d9f432ee6fbf2cd172642a246cdbeba7d34050c2da4abdc7a466		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 16492 bytes
font_02_sfnt_off0000a225.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA225 4324 bytes

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