Malicious PDF — malware analysis report

Static analysis result for SHA-256 e117d71b4f56732a…

MALICIOUS

PDF

44.5 KB Created: 2020-10-23 00:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1a2a339fc842fee6c04238e4010a9253 SHA-1: e3e357b4225f20be12eef880631ba9e6593bf4a3 SHA-256: e117d71b4f56732a44fe30a79e0991934562331041bd00918696c05a74c4658a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://cctraff.ru/aws?keyword=biology+gk+pdf+in+english. While no scripts were extracted, the document's structure and embedded links strongly suggest an attempt to direct users to potentially harmful content, likely as part of a phishing or scam campaign.

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://cctraff.ru/aws?keyword=biology+gk+pdf+in+english In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f87e3bf15bfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f91f2d6cd71f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8c7dd371252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5f91f2e58da88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f90986c4ee61.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/1/0428/6342/7751/files/manual_handling_risk_assessment_tile_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6423/6481/files/xosire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3669/9555/files/ninuvurazawirozemezila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9810/6776/files/patras_kay_mazameen_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b076cac5-4f3d-4e86-8e6d-b1fe6c58a8a2/pegimuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e74471-15fa-4bcc-b8f9-718d69383ab4/69964709965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72f2dd9-59a7-4c3c-bff8-339d6054fd4f/22937086823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/133fcf02-055a-434e-bd14-be0492744073/46369333796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d204fbb-d316-4fe1-920f-bb19d28b31ea/noveguxonugejobakojugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/576429c3-76dd-4d4d-96b1-273786b2b763/98092705884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eacd94a-eb2a-4022-954e-2f81f386bb5a/the_great_gatsby_study_guide_and_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47160265-222a-483f-9e5b-d351e854f516/zeluxuxekokake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226557e2-5318-4ca5-90ef-5ad75038f3e6/kozusifuge.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_off00006e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 5212 bytes
SHA-256: c170a7399bda9d51a664bd16852208b9717b41ebbcbd1ec077afdf02cac2ea24
font_01_sfnt_off00007ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 10920 bytes
SHA-256: 55b3f3b9aaafdb724d6e6c42928a74faeb0996269b2451f61493b9bb6008ea68

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