Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf26dbe7bbbc3e8…

MALICIOUS

PDF

46.1 KB Created: 2020-09-10 07:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9a508e6517e03c736a55a5fb9dc469 SHA-1: da03ce7a19db3f5abdcb954772b583f735ae676a SHA-256: aaf26dbe7bbbc3e867b6e679916fbc1ca62c4df37cca2e9c536c375268a13f33
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.me/wix?keyword=admiral+mcraven+make+your+bed+pdf`. This indicates the document is designed to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to mask the malicious redirect. The ML classifier also 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.me/wix?keyword=admiral+mcraven+make+your+bed+pdf
    • http://xabimed.andrewfosterdesign.com/uploads/1/3/0/9/130969110/7656394.pdf
    • http://files.squarepegnation.com/uploads/1/3/2/8/132816195/vesigonixatidagumona.pdf
    • https://static.usrfiles.com/ugd/191a6d_02a2d3bd7308464099d7f3c90de363d3.pdf
    • https://static.usrfiles.com/ugd/3b47cb_9f3dba160c674c8dbae83dbda4f78f9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b06a2d3d25fc4f509533f5b8e18b48a4.pdf
    • https://static.usrfiles.com/ugd/682d1c_b469ff8ede354fbbb2ff803005eb6c5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_02c5162ab6da4f1a90a64da69f73a5f9.pdf
    • https://cdn.shopify.com/s/files/1/0434/5774/0957/files/bmvc_poster_template.pdf
    • https://cdn.shopify.com/s/files/1/0460/7465/8980/files/order_attendance_allowance_forms.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/habanera_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/online_classical_guitar_tab_archive.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/21959510465.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/92387425046.pdf
    • https://cdn.shopify.com/s/files/1/0430/4915/6757/files/tenibodosovaze.pdf
    • 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_off0000779b.bin
5c390c491d19c569e865347052ef09fe71221a4842c66e72e592965587fab1ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 5480 bytes
font_01_sfnt_off00008a34.bin
e92b4ab1f4720d4f82b4ec445e8575272a1c3d8703b2c2471a196c64468b7299
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A34 9824 bytes