Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fa883df1250529…

MALICIOUS

PDF

46.5 KB Created: 2020-10-27 09:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 4057db92c27d1a0ab9deaadf1c96bb3f SHA-1: 740e4ff8ac29bbb85bde8eb12784bfc63a42a444 SHA-256: c3fa883df125052914d4d899a52acfa45beb00774b7ba192a0ab412f29d3c398
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'mini fridge manual'. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=absocold+mini+fridge+manual In PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/3cbaacddc3406.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/xoxezal_vodapusej_pulobuvodibepo.pdfIn PDF document text
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/vofevuserilagapexeki.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/2126607.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/zokutura.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/7526feb4-f440-4c2e-9678-5e2e53540bb6/puxemavawifopalenabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f42cf3-1f15-4961-ac67-ca835a787946/sinovizetomodedejavuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e369776-50fd-49a7-aecf-9524edb8c363/2968480185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f3239b-7094-4429-aaf7-5e313481e546/master_of_self_realization.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcfa7f8e-1853-4139-9b3d-db864ee7a1ea/wedufuxolazud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f36e2a5-9986-4f43-b1e0-a3250fcf3e96/3857363995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/928afa23-434c-4ccf-9429-4b494eee952e/attack_on_titan_season_1_episode_16.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/sekokureratuxinakanuteleg.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/jezefewezosazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06491108-a6a1-4924-8c09-d89a940b0cbf/31212290131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8770d31a-6d36-45ca-a80a-287fb9924eef/nedixaxusifaligin.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_off00007623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 5472 bytes
SHA-256: 83c35cf2cc910d9ec76c0fa963c53bb533e57ef295fb033ffc38cd0291fb3b7c
font_01_sfnt_off00008895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8895 10744 bytes
SHA-256: 18749c3887b713cc08214c591be66c6a5ba7be73b28b7ac959a88be669442adf

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