Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be0044f28ff6a94…

MALICIOUS

PDF

49.8 KB Created: 2020-09-11 07:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ca6ab300078dd982faff55689e46b74c SHA-1: 1bb5551feaebe40a2544264e479ed0cb94a702e0 SHA-256: 0be0044f28ff6a947d20cf7c4293c870ae9e7f568419eaca7cfd84c39a302678
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to image editing, which is then linked to a malicious URL. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO manipulation or to distribute 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.com/wix?keyword=picsart+editing+images+full+hd In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/5bf82b_5be94fc49443491e8eb6851d0f23c40d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b2ba6b_df0e4673a7f04f0e9537b1d7e8052d4d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d9a50_4099883477ac4999b3237ca68b4b4e5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/44573736854.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d17951_e07846f029fb49ff85474f761dad7ad6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/277b62_6a929baea0f7495cae0757cc256f1977.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1e4819_36318609122644fd99038560111b8d89.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e1d12c_6af50c8ab78a4a37aac8ed5ebf9d30fd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_88832ff918c442568b08c5cada25cd28.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e32576_bc647009f3f94e43b53c1667b1dd2a1f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b77d207c14c04e569c7a4c6da3a3e7e2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7730 3320 bytes
SHA-256: 67bb5bd6a3338bfd333d0b37e755b7752084398ba169bec2f19cc4fa0c933df8
font_01_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 5436 bytes
SHA-256: 7a6b5485ef2925d7dcaf6377bec1e9326033ecf5f91344788c773465b05d64ec
font_02_sfnt_off0000956d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x956D 10756 bytes
SHA-256: ec57b246f5e0233b3f7d2a4497d0f9115cd7bb3930437f2e81d3b47cccb54fa0

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