Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9ac21a46cf0bae…

MALICIOUS

PDF

38.1 KB Created: 2020-09-09 23:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ad52425936eea54b71ebe6ca5ea7afb5 SHA-1: 063b6017ee31c2ccc3b04c4ed255f1d3cd50bc04 SHA-256: 4a9ac21a46cf0bae053a3e9cef69049997e9c4bacea8b862dc66a55409c1543e
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a movie download. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files. The ML classifier strongly indicates maliciousness, and the presence of a download button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=mission+mangal+full+movie++mkv+720p In 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/1/0431/7210/2308/files/padebigabitur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/74001910461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/ganimo.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d7c203_b1399a96bac24325b54eb542b672a23d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/87b9a8_00754da96b9f407592ae8ffd7f206224.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fe83c3_ef97e5a54a5d47c0b61ebe43410ce676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/5048212927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/30254973874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5575/0049/files/burnout_3_takedown_pc_bagas31.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5499/6375/files/kijenuvatoduzimesuwaw.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_442329143f1244b99b68507da90d1fdc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/88a84f_1d7be04926f44a5599e82e906ddd5dc8.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_off000054e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E2 5608 bytes
SHA-256: a2716e69a828511e6d98313a587da4573eb818879898c2d04cce53f89abc81e4
font_01_sfnt_off0000680c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680C 10344 bytes
SHA-256: 66c94c91b2cde51cdbd0161ba5041a7f4923dcab67997ba1ff43989e1788588c

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