Malicious PDF — malware analysis report

Static analysis result for SHA-256 1755599a55db91d3…

MALICIOUS

PDF

40.1 KB Created: 2020-10-31 15:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f649ba9f72863a542efb7e0c59f1034f SHA-1: e9f6b1cba9037b1dec4a8de70c726a58c6ad1c89 SHA-256: 1755599a55db91d32282f0da293a008f8c0305c517a2fb485c2ad7e4e740a7ae
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, https://cctraff.ru/wb?keyword=new%20international%20dictionary%20of%20old%20testament%20theology%20pdf, is the primary indicator of malicious intent. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, likely for further exploitation or credential harvesting.

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.
  • 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://cctraff.ru/wb?keyword=new%20international%20dictionary%20of%20old%20testament%20theology%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f8ff9702a0b2.pdfIn 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/1/0428/9075/6252/files/41719828984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10aa95b4-52aa-45e7-9a3b-a0b556074835/20601256047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5466/4342/files/convert_to_word_2020_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a1d9f8b-b343-47a2-8342-11ad13d61b2e/74042513834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6835/8807/files/sample_communication_strategy_and_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/array_in_computer_science.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jebukiralizit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a73a51-a276-44cf-b054-c96ceeeea257/27924671075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1551/2479/files/funbox_hd_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/mufixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77157f14-6548-4edd-be22-2c0709def119/17142305251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6823/5162/files/editor_de_fotos_online_gratis_para_android.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_off00005c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C93 5732 bytes
SHA-256: f39df857403cae392e067034dea37915c9a69ddbf5f8fa3eb438fe9aa896fd5a
font_01_sfnt_off0000700f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700F 10300 bytes
SHA-256: 8283710e9db09da47010edf2368bf32023a38068e425cf86817256d88ddc6bbf

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