Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ea55402418508f…

MALICIOUS

PDF

41.9 KB Created: 2020-10-07 23:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e223c2f630db18db41e6f8a5669c3a51 SHA-1: a2e08bda962ccf28ba605cac980a0f03d5ee6322 SHA-256: 93ea55402418508f32afa8fd29bf0feeb89061e9b5c8648f55812bf73bca06bc
154 Risk Score

Malware Insights

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

The PDF contains multiple links, with one specifically identified as a redirector to a malicious URL (https://ttraff.link/pify?keyword=montana+youth+challenge). The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm or a mechanism for distributing further malicious content. The ML classifier also strongly indicated maliciousness.

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://ttraff.link/pify?keyword=montana+youth+challenge In PDF document text
    • https://site-1036803.mozfiles.com/files/1036803/bolafatavegefol.pdfIn PDF document text
    • https://site-1038836.mozfiles.com/files/1038836/58542267916.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/30676149541.pdfIn PDF document text
    • https://site-1039481.mozfiles.com/files/1039481/38561889175.pdfIn PDF document text
    • https://site-1038508.mozfiles.com/files/1038508/pepewilofemojelizu.pdfIn PDF document text
    • https://site-1044107.mozfiles.com/files/1044107/torowosuzigewujozowote.pdfIn PDF document text
    • https://site-1039528.mozfiles.com/files/1039528/98029005493.pdfIn PDF document text
    • https://site-1039923.mozfiles.com/files/1039923/maxajisuwerebejetero.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/43262285313.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/1/0493/7426/5503/files/38628502767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4116/5990/files/riding_with_death_painting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0040/3880/files/85883636214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0259/5997/files/28353748143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60adb232-38bf-4131-9c41-a35f5b9ab1d7/39716364805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b637ca3-e09b-4b2d-ab43-eaf3dc8d0dae/vutimusok.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_off000063e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E7 4896 bytes
SHA-256: 8830c1d402b940a68a34e638d2eb45c1ec53ed10e7de562631ce840e2b7b29b0
font_01_sfnt_off000074a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A7 11504 bytes
SHA-256: 17faece746e09c7ec466a945dcb10a57ef35e1c7db49b9d6f7d6a5ae1f4164ce

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