Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33f024713462200…

MALICIOUS

PDF

44.3 KB Created: 2020-08-12 21:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96f2a92281605cb1dc3a5c9784504570 SHA-1: b0758e66006d02a7d111fcdd634c80c65b7ce679 SHA-256: a33f0247134622006d9468d1d222b86d1b3bb3cf99ed189658166c510f8619fc
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at ttraff.com, which is disguised as a Cisco router troubleshooting handbook. This suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=cisco%20router%20troubleshooting%20handbook%20pdf
    • http://files.iloveiodine.com/uploads/1/3/1/8/131856212/mavavuk.pdf
    • http://files.cedarsmontessori.com/uploads/1/3/2/7/132712407/78d9fb040f35.pdf
    • http://files.lakshhealth.org/uploads/1/3/2/6/132680908/goroza.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/badewegavixinojopit.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/pemotaregoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/51239950052.pdf
    • https://cdn.shopify.com/s/files/1/0453/4665/2315/files/como_fazer_uma_assinatura_digital.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/cooper_bussmann_fuses_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/65247702369.pdf
    • https://cdn.shopify.com/s/files/1/0433/4020/2142/files/94455318041.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/delowilanobubebaded.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/ams_c_26074.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/juziw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/dovera.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/error_uploading_server_rejected.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/24232435041.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_off00006ee6.bin
87a155b08331449993cb0d761daa61b466e777a9066d4e4f9d28b67f2ca6597f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 5524 bytes
font_01_sfnt_off0000819a.bin
7364a12a697fb01d0d6a4014cabf4985e137aa623fc68b449a2b784c4a797406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819A 10004 bytes

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