Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b61553f435045b…

MALICIOUS

PDF

35.6 KB Created: 2020-10-22 20:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f71c8a74fd5a66c1b8961c4f4c2a9187 SHA-1: 283cef8e617916b8f399c006fadd787981216f1a SHA-256: 86b61553f435045b442574c0b33fd352bba360e3063544aa50a89645c7b8bbf7
152 Risk Score
Tags
free-cdn-ebook-manual-lure

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 a redirector infrastructure. The primary malicious URL identified is https://gettraff.ru/aws?keyword=the+bassoon+king+pdf+free, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains references to PDF downloads and the malicious URL, suggesting a lure for users seeking free content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gettraff.ru/aws?keyword=the+bassoon+king+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5f8d3da666834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f8c50a6bd810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8e5c9e305a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f8b62a5bb748.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/5938510.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/2956675.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/9124cb55f377.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/ebaf340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f8d7e3ecc165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f8d73319185f.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/d5ca737c-8ed8-48e9-8215-4b5d3335bd9c/nom_propre_et_nom_commun_ce1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ece04f5-1561-47bd-90f3-548e8f8ac56b/90355370863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/940f68de-c45f-4591-b8af-c7b9cf870b27/zadegowixewelivizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba7e2518-b313-4aac-83e9-b60fa40f8691/91665502829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57bc6f3-19a0-4771-a22b-52cd1120b1f6/sopudiremob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/all_for_love_by_john_dryden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5321/9479/files/26630362231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7619/0361/files/what_are_core_values.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0540/6115/files/kudoteburojimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc7e4cc-fa0a-4061-b505-0274d16345c3/89012161854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd5ef67-75d6-484e-8954-94d34cc571cb/volebitomotodeletivuzilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca65be2-357f-4df2-8465-0a59b107fd38/kasuzube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f8a37d-8a1a-4297-99e8-e9533a2169d4/rejopuserebovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc853ed-b494-4f60-a082-d408a8de4fd3/juzimadajitodubod.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D6 5424 bytes
SHA-256: 33c27ad0cf60a744b88992fd76e09b864b2fb037275ea65a4b9a1e7acec5a5ba

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