Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d6391d84c7953a…

MALICIOUS

PDF

85.9 KB Created: 2020-09-17 21:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e56cabcc8aedd7cc095de7a486434bf5 SHA-1: 0a7fde7777f9681d5ed002b4a8be3ba25db9ceba SHA-256: e7d6391d84c7953a9cb4d4b786e1823e046be92bd5cb7a178203d77c30b64703
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the string 'mrs doubtfire script springfield' and the malicious URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=mrs+doubtfire+script+springfield
    • http://dusibi.samanthacotterill.com/uploads/1/3/0/8/130814868/xafeb.pdf
    • http://ridifir.loveadelyn.com/uploads/1/3/0/9/130969525/5402300.pdf
    • http://files.madisonwidivorce.com/uploads/1/3/2/8/132814276/9dc0b8832.pdf
    • http://files.royalpartycompany.com/uploads/1/3/2/7/132741375/wewujuredegesenurum.pdf
    • http://files.humanbeinghumanrights-eng.org/uploads/1/3/1/1/131164552/lilalevudavopat-doxug-konatedijowef-kumovojivod.pdf
    • http://zuwoxaw.plymouthgroup.com/uploads/1/3/1/3/131381762/6403760.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/que_son_las_autolesiones.pdf
    • https://cdn.shopify.com/s/files/1/0457/6487/0300/files/7424812949.pdf
    • https://cdn.shopify.com/s/files/1/0438/9437/4555/files/wallpaper_3d_anime_android.pdf
    • https://7ae49176-0174-4cf3-8ae5-fde30fa7fd24.filesusr.com/ugd/f08e01_ab024f7090bf47e3a1b718d16d38400b.pdf?index=true
    • https://a8598f2e-cea4-458a-9e7f-03298c888b4b.filesusr.com/ugd/90423f_550531f988a94fae8fc4d8f612313228.pdf?index=true
    • https://3611be81-fc9e-4acd-903b-bb240cf45df9.filesusr.com/ugd/911c12_56ec903189cd42ca8b6e6454d30bb897.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115f7.bin
ea78c09be946ed59052d9f0d0df86932fabf2d78a8cc825399f6d095e1696909
pdf-font-stream PDF embedded font (sfnt) at offset 0x115F7 5256 bytes
font_01_sfnt_off000127f1.bin
2766a5b8da70530282beefbd98514a9de52819d9853b7a4b4a2beb9490c57568
pdf-font-stream PDF embedded font (sfnt) at offset 0x127F1 10184 bytes