Malicious PDF — malware analysis report

Static analysis result for SHA-256 770a1b2c51afebd3…

MALICIOUS

PDF

40.6 KB Created: 2020-10-10 22:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 21d60734e1172b90d2012f1cc3a7a0cc SHA-1: 671fbb40f385aacd995f16323eccd13520c26326 SHA-256: 770a1b2c51afebd323c06a9a1aa6b90bc61eec0017c64583023b3a985062e877
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for malicious redirector links, pointing to 'ttraff.club'. It also exhibits a PDF link farm heuristic, embedding numerous external PDF links, many of which are hosted on 'mozfiles.com'. The document body, though partially corrupted, contains the text 'There is only one level 3 stage 4' and a URL that matches the redirector link, suggesting a lure to external malicious content. No scripts were extracted, but the embedded links are the primary indicators 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 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.club/pify?keyword=there+is+only+one+level+3+stage+4 In PDF document text
    • https://site-1042926.mozfiles.com/files/1042926/xekipuwalesabozurexugopi.pdfIn PDF document text
    • https://site-1039753.mozfiles.com/files/1039753/74600879595.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/dopitirizek.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/1/0486/0923/1006/files/royal_highlands_leesburg_fl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3649/3992/files/red_dragon_weed_torch_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2979606f-2c50-4526-a347-ea272c0b9cd7/7916921218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33564437-3bb4-4341-a08a-a79eb3fe4263/lavifuvumufadodakidutar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d225ee73-d0c3-40f2-bb1c-28da177fec30/duwudozez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df33cc83-3ddc-43b9-94ab-4b27c19604ec/vufujofafozivipaziv.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_off00005f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F85 5312 bytes
SHA-256: d714bc966a9d79086b18d460d8ad0490bd0b48ea5efeaaeac97ec75d1d9ca4d8
font_01_sfnt_off00007199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 10660 bytes
SHA-256: 03bca9f2284ea4e838fbff592737c76adf243f97567090cb1c1e1dd62b36596c

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