Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd44bf6febf81a31…

MALICIOUS

PDF

44.0 KB Created: 2020-10-15 06:39:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 694b448c2d23fb44e9982c95d284e3fc SHA-1: 9ae52779cc7a2db6ab53cab96bbd742fedcc94a0 SHA-256: bd44bf6febf81a317e9d3542704e3a330522596fdae765a08b2aef6a72d16f2e
124 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL suggests a lure related to 'android mod apps 2020', likely to trick users into clicking the link. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of malicious intent.

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 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://gettraff.ru/123?keyword=android+mod+apps+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f879bcc90eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f851aecd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f878755a91b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8763ce8c784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f878e272ad0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f87896e23ed5.pdfIn PDF document text
    • https://site-1039488.mozfiles.com/files/1039488/pozinodabisifiwekafinux.pdfIn PDF document text
    • https://site-1043295.mozfiles.com/files/1043295/foziputibujizowumexopur.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/vagakolikerab.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/pevuvute.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/1/0484/8589/2246/files/75021507044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0054/4418/files/63621624632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5385/1039/files/75132997239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5933/7621/files/62812477573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4286e217-4d01-4231-aa64-3311d593ac5d/lusig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8150b458-6e83-40ba-89a5-33bf2ba0fb14/lusolekiwojudubokidasugex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588c7ff3-4f9c-4562-bb4d-42c03564f8c9/23044307859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906cea4d-11be-4516-a652-ba701a6cf235/13767246460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226ba8ff-00ad-4e0a-b004-6b90626c9e45/wilugonupesun.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_off00006d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D15 5336 bytes
SHA-256: fc6af0e6b17b08fe9d706aa2b2367876367d42327b7e59bb26ed562f358c54d5
font_01_sfnt_off00007f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F13 10864 bytes
SHA-256: 0797932ef5271e8421e51e6367c9cee74077b37310ae81af8a72322da9fc6433

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