Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4669156382955b…

MALICIOUS

PDF

63.7 KB Created: 2020-08-01 22:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 073a1bb0a40b684378d69783eeaf63b4 SHA-1: 35749332ef4bc0b02f4ea60aa04ed68bed04481f SHA-256: 5e4669156382955bca5852dc5f47abb96bdbd3a2bd98f82638a1bdafe0fa1d96
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 external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=honda+70+dirt+bike'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links and the malicious redirector suggest an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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.ru/pify?keyword=honda+70+dirt+bike
    • http://files.colombotourpackages.com/uploads/1/3/0/8/130873708/xulizajelinif-zisuz-datesededezapof.pdf
    • http://files.pianolessonsrichmondbc.com/uploads/1/3/2/6/132696512/e397e26b3057.pdf
    • http://files.hosshoofho.com/uploads/1/3/1/8/131857114/dakutomog.pdf
    • http://files.redflashstudios.com/uploads/1/3/1/4/131482941/kejujekarimu.pdf
    • http://files.theventuracountylife.com/uploads/1/3/0/8/130873895/vazuxopesili_vodakan_masaginu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/56078228048.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3504/files/precalculus_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/67351804986.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/gerudesuvigavan.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/17860844523.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/20510202759.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4236/files/3235052482.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/fupumokanadive.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/xizagonifom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/30948635351.pdf
    • https://cdn.shopify.com/s/files/1/0438/2461/1478/files/gemaluka.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/73145715360.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/vixol.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_off0000bb65.bin
595860ef5c412c3a8ac25fe2f9b0c57054c665819f0505ab94dc03c3d5abb0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB65 4996 bytes
font_01_sfnt_off0000cc6e.bin
ff77c4f27cb595f1d7e0b761ace63b981643552afd834e05ca41d7f3ab47746a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6E 10952 bytes

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