Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ba20bb5ffc9186…

MALICIOUS

PDF

54.3 KB Created: 2020-11-04 10:38:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5a45a4464bde044e25b1dcd84074548e SHA-1: c5db34f3fba7d5bb4103a38cefe2e2e94a5e5a99 SHA-256: a0ba20bb5ffc91867f1296bd8b5118c1a632ed30a2e5fd81f567ab243c5f2f3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body contains the URL 'https://ttraff.cc/123?keyword=openttd+cargo+distribution', which is likely the primary malicious destination. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect users to a harmful site.

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/123?keyword=openttd+cargo+distribution In PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/korudutiku_rovolat_zadabidosetonof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f89dd1f41090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5f956ee9bcd75.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/gitesujolute-lodegesopi-limewibafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5fa18c773303d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e005a33-95f4-43b0-a7bf-afab55ef36cc/41299990395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3c19a9-0842-4301-9cfc-e3719edbcb01/25497127905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79de0677-d9c5-4edc-bf97-e0a5a96da99f/13550380438.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/precision_wood_products_inc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c89b2c-219a-4b37-9908-23ba4f542993/lonelipasujodufedikava.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/acog_preeclampsia_guidelines_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f5ada2-9b09-4882-909a-eba3577a6f13/42081754385.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_off0000937e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937E 5376 bytes
SHA-256: 65210a9c736341c8f65b7430b3769a70b5c708cf02f89044a2e6c5e614985c39
font_01_sfnt_off0000a5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C9 11844 bytes
SHA-256: a10078c389d87d8222b3901ae80f35cf4f068273abbea447e7f3a6dfacd510fe

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