Malicious PDF — malware analysis report

Static analysis result for SHA-256 062065525728ff5f…

MALICIOUS

PDF

34.3 KB Created: 2020-08-14 03:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07caafce920e56a2391d33790436ee5b SHA-1: a118872a559c9f81a1caec9732dd3f4fd4122e22 SHA-256: 062065525728ff5fedb5d595674195a1f07291e522906eb369e87f8aae8d95d0
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 potentially malicious redirectors or link farms, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to external, potentially harmful, web content.

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=gauntlet+slayer+valkyrie+guide
    • http://xiragin.slsareascouts.org/uploads/1/3/0/8/130813765/jeporexize.pdf
    • http://files.allisonroseentertainment.com/uploads/1/3/0/9/130969110/7963697.pdf
    • http://files.blacklght.com/uploads/1/3/1/4/131406321/f6e8ac.pdf
    • http://files.disciplesoutpost.org/uploads/1/3/0/7/130740510/5229b69d0b26a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/alexis_adams_pornhub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/90390284053.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/capites_de_areia_livro_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/lego_architecture_sydney_opera_house_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/sawupevizogejan.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/iowa_food_stamps_application.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/gotulukanawemiwutixab.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/1680189347.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/92974445304.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_off000047dc.bin
b1a69acfe6c0ec750ba6305adc75cd5ad2ce24ede244c082052f954edbf21abd
pdf-font-stream PDF embedded font (sfnt) at offset 0x47DC 5248 bytes
font_01_sfnt_off000059da.bin
97461430176bd4b5779bbe11960406f78f4ebb600a00ff34f7dd5e5d875d8040
pdf-font-stream PDF embedded font (sfnt) at offset 0x59DA 9700 bytes