Malicious PDF — malware analysis report

Static analysis result for SHA-256 79827763b894375c…

MALICIOUS

PDF

52.7 KB Created: 2020-10-29 06:32:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b4e444d4dd1c5b1e0194bdcba6ada2f SHA-1: 1c8fe054c45a8087d3e1634619153d6cd6ec4612 SHA-256: 79827763b894375c2d04084517add4eb79d62ab2b657e495e871cc08e6c52ed8
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'https://ggtraff.ru/strik?keyword=asme+bpv+code+section+ix+pdf' is the primary indicator of malicious intent, likely serving as a lure for further compromise.

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://ggtraff.ru/strik?keyword=asme+bpv+code+section+ix+pdf
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/8278019.pdf
    • https://vutizimowunofe.weebly.com/uploads/1/3/4/3/134354130/c224126d8f9f2f.pdf
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/186b2520351.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0498/2800/4039/files/2888893628.pdf
    • https://uploads.strikinglycdn.com/files/b8dc8de8-4530-4bba-ba19-ffa8fa0ae90b/62925783829.pdf
    • https://uploads.strikinglycdn.com/files/d34bf85e-aa06-4b27-9598-168f08af8b16/vurabok.pdf
    • https://uploads.strikinglycdn.com/files/c8f4d492-2d58-40d5-b8e9-46553f31f166/kakajutotiwikav.pdf
    • https://uploads.strikinglycdn.com/files/5893b3a9-f5c4-45a3-8e20-f5c8b3cebc4f/46841903223.pdf
    • https://uploads.strikinglycdn.com/files/e1a45398-3b51-4ef3-bc41-d8903b6b5df7/rebetiwuj.pdf
    • https://uploads.strikinglycdn.com/files/4eca42ff-e76a-469f-8085-9cf447f00590/the_20_20_experience_deluxe_edition_download_zip.pdf
    • https://uploads.strikinglycdn.com/files/fec1321c-6f5a-437d-beee-bea49fc67821/amelia_island_fl_map.pdf
    • https://cdn.shopify.com/s/files/1/0482/8354/9857/files/digital_fx_option_price.pdf
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/13142220747.pdf
    • https://uploads.strikinglycdn.com/files/c0bc9682-e784-4dda-b73b-ae124fcd7dd0/zofatebisuzer.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/which_of_the_following_is_true_about_the_effects_of_alcohol_driving_for_life.pdf
    • https://uploads.strikinglycdn.com/files/bf2fe3cd-d39d-46a8-bb24-1d90777052e4/piwezasufexiruw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/teachers_day_odia_speech.pdf
    • https://uploads.strikinglycdn.com/files/d269b713-c86b-42bb-9c8b-1bbfc2782c81/xukejidatirepusizetipav.pdf
    • https://cdn.shopify.com/s/files/1/0498/9390/0455/files/vaulty_app_free_download_for_android.pdf
    • https://uploads.strikinglycdn.com/files/c987249c-5422-44e9-8375-fadce8563f11/fefupiguwutemexir.pdf
    • https://uploads.strikinglycdn.com/files/dd391f99-7f80-4f02-a272-043b328928b2/mekojefazikiniga.pdf
    • https://cdn.shopify.com/s/files/1/0481/6001/4487/files/lutuzukakone.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007943.bin
305e0c1b68557913104a4f69ac687551b94b12a2b06999b0c52bfb73b49e675b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7943 6172 bytes
font_01_sfnt_off00008e62.bin
82479440f37ea6da1dc71449da4cb52f7b53c40e37f16f2d1e980be4c77f3509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E62 5220 bytes
font_02_sfnt_off0000a023.bin
1ad48dca20b9b52814002d2bc485b5d0e2fc73b064b09f4b998d09aff756d73a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA023 10864 bytes

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