Malicious PDF — malware analysis report

Static analysis result for SHA-256 362818b55a055bb8…

MALICIOUS

PDF

42.2 KB Created: 2020-10-08 12:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0fe1ae4abdaf0d31781f2e844858b29c SHA-1: 9908c040559f7d7b5aa88e712e7c8c8db45fc7f5 SHA-256: 362818b55a055bb8c279b59eb89a444226e2982ff9b5a1289b51c3c41acee5ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.com/pify?keyword=fruto+del+espiritu+amor In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9382/4166/files/emmett_kelly_flambro_price_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5950/1464/files/norfolk_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3197/7369/files/uml_dependent_verification_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2255/6058/files/bezuxusis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3594/3061/files/dovokaboli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601fe3ef-45d8-4a90-b229-06a42ac05138/dekaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8dba7b-a7b3-433f-8d5d-e2aa743d1f03/mujimojepesisuvimejazelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589c3d93-75b0-4467-a36e-cdfd9f69d54c/96535101548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339f125a-3c17-4fda-a59c-6cd998d28483/ditokizoxisimasevuzif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721d2726-a25b-4c54-a069-1543f629b7e1/18687888965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d23629c-56fc-4b2d-a877-3e5e13ff2459/37447096502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99474005-c838-490e-98a9-e6f7936d88d9/nopisij.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B1 5060 bytes
SHA-256: 3845325d45c95678b7dd7869f0f6844a25a5321b868f484adec81081251328b7
font_01_sfnt_off000076cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 11016 bytes
SHA-256: 33d36812cc8e839f6d14abd11bd74b95d64b4268bfddd5e73fe0d9f174b859a4

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