Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a6296ba7c4c184…

MALICIOUS

PDF

43.3 KB Created: 2020-10-15 01:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0e094e968963212e641d2d9462eaed41 SHA-1: f7be8e090b6bbbeec21ee3b40e8d829d198a081c SHA-256: 82a6296ba7c4c184209aa19ddbb8ef1ce9b1fd7ec45e03fa58c742e8fcbc3f08
184 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm designed for SEO manipulation and user redirection. It contains numerous embedded URLs pointing to other PDFs hosted on disposable domains, with one primary redirector URL identified. The ML classifier strongly flagged this sample as malicious, indicating a high probability of malicious intent. The primary goal appears to be driving traffic through a redirector chain, likely to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=d+day+mod+apk+rexdl In PDF document text
    • https://site-1038909.mozfiles.com/files/1038909/56589087732.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/vagotuju.pdfIn PDF document text
    • https://site-1039435.mozfiles.com/files/1039435/xogesakenapun.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/xigusuzegipufana.pdfIn PDF document text
    • https://site-1041761.mozfiles.com/files/1041761/mipeturawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8700d12922a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8715e591ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f87687d36c41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f8745dc581c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a35c2f-2422-444f-a71b-dea8fb3f1ff2/segawav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2613d63a-8816-4275-92ba-619cdab65c60/42149722541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6e586b-75d2-4baa-87d8-4697ce83d879/55452362406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f91b62-a739-4ff7-8390-25e31a6f9a6b/titatovoporesekil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f2ad9a-a668-4e0a-804d-cc1df7290294/derigozekefesirixegafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8711/2613/files/aircrack_apk_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/life_size_millennium_falcon_inflatable_tent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0902/2376/files/podatixujanoseve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4680/4900/files/39347029324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2367/4787/files/its_finally_friday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71587001-1af1-4782-be38-10531954d79f/tusijigiraponalik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a17834-fce7-4c02-8905-01c82df99340/jojilejeromasigup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cac67d-f8b7-4967-b8f3-d853cfc2d183/65516907310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c10c568-af87-434e-a33b-7ecb73b62969/lobejerevixadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7a4bd2-72cb-44c4-9f5b-fdf111c5400c/19346718645.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_off00006a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6A 5160 bytes
SHA-256: 670dd1c25a5eab776fb9c09419274fe6bc6da0cc3d5695f00fbfbf2b8ff6bc11
font_01_sfnt_off00007bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFB 10508 bytes
SHA-256: d28b091b2f529a446dc2e97f54ba514589b58a0af6b72980e094f3736ff1daaf

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