Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6d49b0f9386183…

MALICIOUS

PDF

42.7 KB Created: 2020-10-27 03:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b347b4fee2c26fda7816fdf339105ab SHA-1: 153ba8d2834c1d55bf01292ec575f6cec93a872e SHA-256: 6e6d49b0f93861832f01fd7a23dc18cc97470bff3d83a1a41ff8de1cd6a11d47
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to appear as search results for 'scribblenauts apk download portugues', leading to a malicious redirector. The primary malicious URL identified is https://ttraff.com/123?keyword=scribblenauts+apk+download+portugues. The document body itself is heavily obfuscated but contains references to the malicious URL and numerous benign-looking PDF links hosted on Shopify and AWS, likely to improve SEO ranking for the malicious content.

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/123?keyword=scribblenauts+apk+download+portugues
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f86fcac0249d.pdf
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f8c8339ef117.pdf
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5f8bff4a77d52.pdf
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f88354ae70fc.pdf
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f9737f1112b5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/81538452844.pdf
    • https://cdn.shopify.com/s/files/1/0494/1211/2551/files/82590663719.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/rifusezazakusuzagob.pdf
    • https://cdn.shopify.com/s/files/1/0483/8676/9053/files/videsexukepeja.pdf
    • https://cdn.shopify.com/s/files/1/0482/2931/8808/files/supidefe.pdf
    • https://cdn.shopify.com/s/files/1/0266/7806/7393/files/51665304057.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/review_of_nuclear_medicine_technology.pdf
    • https://cdn.shopify.com/s/files/1/0485/2052/8027/files/mitosis_simulation_lab_answers.pdf
    • https://s3.amazonaws.com/bevekizadoxuj/tesajobikorimorexawu.pdf
    • https://s3.amazonaws.com/memul/17859225335.pdf
    • https://s3.amazonaws.com/leteraxewe/assimilation_psychology.pdf
    • https://s3.amazonaws.com/vatosolikijike/jurnal_asma_pada_anak.pdf
    • https://uploads.strikinglycdn.com/files/73cd9e0a-8226-4d1f-9fbe-dfa903e3727e/muxun.pdf
    • https://uploads.strikinglycdn.com/files/d55164da-27b6-41f7-9812-c51856e194fb/cutting_edge_upper_intermediate_3rd.pdf
    • https://uploads.strikinglycdn.com/files/83612823-79d9-4c1b-a703-777b78e56055/kefetakupab.pdf
    • https://uploads.strikinglycdn.com/files/57749da3-637e-4b1a-abff-a805615254a7/54045858590.pdf
    • https://uploads.strikinglycdn.com/files/4f4cd423-a2cf-446d-adf4-0e2c82cc719c/94420167492.pdf
    • https://uploads.strikinglycdn.com/files/ac2ca77a-b92b-44de-bc96-2cfb90c26472/cwb_welding_symbols_chart.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006239.bin
627ec603d289f2576e183971140b002fffae2b8239d270b8342447a0fbbe1a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 5640 bytes
font_01_sfnt_off0000757f.bin
40821fc5ccbc839546c18d0c29d673ad2835c1e4d8d6bc22f148be4ffa136c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757F 12532 bytes

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