Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c44ff67ea7808b…

MALICIOUS

PDF

44.1 KB Created: 2020-10-16 18:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4ca3b9ce32aed54877c5c9a2921f3390 SHA-1: e5850943071c508f7ab5bb46f0ab3082949d4a51 SHA-256: 38c44ff67ea7808b8be20a0cb3786053eadadcd8d89d92a4876ea6c808b09378
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links designed to direct users to external websites, a technique commonly used for SEO link farming and redirecting to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL pointing to known malicious redirector infrastructure. The ML classifier also strongly indicates maliciousness. While no scripts were extracted, the document body and heuristics suggest a phishing or redirection attempt.

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.me/123?keyword=word+pdf+%25C3%25A7evirme+program In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/logape.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/miputow_fabifeleriga.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/64d5146.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/6193575.pdfIn PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/738823.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/77295b8f4.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/modularifeku_gujirabupobabe.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/9876145.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/2657550.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/02978767-a271-436a-a528-7763771899c5/luvituzevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc22c79-4a37-4341-ba3f-8b9d8879ab55/10121032777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3270f26f-8ebf-46db-8692-13b7ac6db96e/bizeburofukepozilide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6723/files/noxukerijapoxuridawus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2305/7051/files/69_trans_am_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1129/2314/files/sarijasipisegili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/second_and_sebring_tab.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_off00006ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 5404 bytes
SHA-256: a391dfd60a27b630ac3fb812ac38fd2a9c9d24c6f0b1511897cf9c134e48ae64
font_01_sfnt_off00007d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D28 11368 bytes
SHA-256: ad3baf5c5146b9aa9a40df63482ac6379b79f0271848a626d802b3372938294f

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