Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11b176d86aaa9f4…

MALICIOUS

PDF

60.5 KB Created: 2020-10-07 12:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 300ffbc921ad5a10dcee79baa50bf1ff SHA-1: 21ac1e84900d11838136e23f8218d506c13f9099 SHA-256: e11b176d86aaa9f4ead118e4477e3665628c21fdfd470cf647087c366a1de888
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL, https://ggtraff.ru/strik?keyword=baldi%2527+s+basics+in+nightmares+game, is a primary indicator of this malicious intent. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, suggesting an attempt to deliver a secondary payload or phish for credentials.

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=baldi%2527+s+basics+in+nightmares+game In PDF document text
    • http://fonujate.brfn.org/uploads/1/3/1/6/131637016/novap-bedadagebuke.pdfIn PDF document text
    • http://files.jahc2020.org/uploads/1/3/0/7/130739239/8188241.pdfIn PDF document text
    • https://site-1039314.mozfiles.com/files/1039314/wonaxiparomuxudem.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/24474456458.pdfIn PDF document text
    • https://site-1043702.mozfiles.com/files/1043702/jonamopebiwixosinaxe.pdfIn PDF document text
    • https://site-1039487.mozfiles.com/files/1039487/70544594483.pdfIn PDF document text
    • https://site-1040896.mozfiles.com/files/1040896/najepure.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/1/0497/3766/2613/files/lugununavaketonura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/45626866563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8992/4774/files/gezikifesikarigazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3301/2635/files/fovofugosanotuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7641/8722/files/11358451045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1370c6-7caf-4f6a-b177-85f6a3aacfbc/40247039274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c3cea2-fa64-4312-845b-8d3d71e39e1a/42571799290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe94161-a261-400e-beb1-fb2d34d4de74/gajiwexa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF2 6564 bytes
SHA-256: adb950862ae8465be62e3a5a0f7b0e13a988f89aa6ddf7c1faa3cd2c6402b724
font_01_sfnt_off00008062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 5576 bytes
SHA-256: 602c450e48cf942f634fc969d54938209a716d0429f3d7cc1554ca55a40ed0a0
font_02_sfnt_off0000932a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932A 21152 bytes
SHA-256: 7afbb6fe0307c0c6b6c3dcfa75e28a1ee125b091064f818fea309233660fdf5c
font_03_sfnt_off0000cecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECC 16248 bytes
SHA-256: e7dd620daf02c0a678ecd347fc5723359a6ff9b3b5fb1dc94d34b090327d9a12

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