Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc9c708bf188082…

MALICIOUS

PDF

41.7 KB Created: 2020-10-28 06:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 33e5b76391d5545b421f269b0e3ba4c8 SHA-1: edeed78020164de0e82058a9498913177951fd96 SHA-256: cbc9c708bf18808297e19dc8e9ec5cd2e5f04f9f9191d35371d108d5a59a2a3b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'gettraff.ru'. The document body, though heavily obfuscated, contains a URL that appears to be the same redirector. The PDF also contains a link farm heuristic, indicating it's part of a larger SEO manipulation effort. The ML classifier strongly suggests maliciousness.

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://gettraff.ru/strik?keyword=ashley+furniture+leather+sectional+replacement+cushions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f8958078d16b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f8c7e6ce0171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5f98a2bc2a34e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f969dcb906c1.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/1/0440/7777/7061/files/bujuvilifagajezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/rirulanesop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3896/6438/files/71101616215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/life_after_apk_obb_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7731/8829/files/confluence_change_background_color_of_section.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/zodig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7035/7149/files/mitutiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/out_of_the_abyss_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/algebra_1_eoc_practice_worksheets_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701c9f91-5aa9-4e35-80b5-6f70895c0f56/peselepokoziwakonewexus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38c4689-3ca6-49b7-a438-c875ae00e431/communicating_in_groups_applications_and_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1d052d-a528-4f50-9596-36e5040109ac/physics_of_the_atmosphere_and_climat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8381b53-d7fb-4e43-ab39-bb535be1d913/ingersoll_rand_type_30_model_242_man.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9699/0115/files/rue_des_suisses_75014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/93134420976.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_off0000645c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 5348 bytes
SHA-256: 975b9f8ab154b1fb3c1e364f780b2016718c63400726a55a9f3e6337f65a1ddb
font_01_sfnt_off0000765c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x765C 10120 bytes
SHA-256: 0d29d59f02cd366628f33cab00360e14112eec05fec1deac12c22b99a147a68d

Open this report in the interactive analyzer, or submit your own file for analysis.