Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1d1fb236e750e5…

MALICIOUS

PDF

66.5 KB Created: 2020-08-13 05:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0e289ed96833422908359859edc18e8 SHA-1: 52ac600a247133f03e4447f986024a1701e7c1dd SHA-256: ef1d1fb236e750e57bc352db462bda5291110dd0897312e3af35ad01c794a470
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs. The primary malicious link, https://ttraff.ru/wb?keyword=cultura%20moche%20libros%20pdf, is identified as a malicious redirector. The document's structure and embedded links suggest a link farm or SEO poisoning tactic designed to redirect users to malicious infrastructure.

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/wb?keyword=cultura%20moche%20libros%20pdf
    • http://files.compressionsllc.com/uploads/1/3/1/6/131637325/miwukox_majevexowenewi_xolizijilaleru_rumezofato.pdf
    • http://files.ballaratadventist.com.au/uploads/1/3/2/3/132302859/c09875b25d18.pdf
    • http://files.campbellscostarica.com/uploads/1/3/1/4/131408369/34009.pdf
    • http://files.chosenoneministries.net/uploads/1/3/2/6/132681767/4fe7038c1e48a71.pdf
    • http://files.beachcitysmoothies.com/uploads/1/3/0/7/130740044/bojazodutasus.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/31139547376.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5326/files/32898169060.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/runegosituvuwesozopexoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.pdf
    • https://cdn.shopify.com/s/files/1/0433/7667/2918/files/61204147852.pdf
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/adiabatic_and_isothermal_compressibility.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/les_outils_de_l_argumentation_les_liens_logiques.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5675/files/the_adventures_of_tom_sawyer_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/vuwiborasobajebowiba.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/asterix_comics_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/9346785130.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/ashby_material_selection_in_mechanical_design.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c702.bin
e0deb765b0e78bec13bf20c806e8bb0aaa63019644fbfda7a720a8194fe5a6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC702 5440 bytes
font_01_sfnt_off0000d94e.bin
e1d525718de7e870a17171bcada34c6075836e7fc79dc73650924d2e96f456bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 11036 bytes

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