Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9af24c86623bea5…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 10:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0be085ce6c62ab689b2f2a3ffd2438f0 SHA-1: 6c269a46fabfe5863b2742688d0501c60060a248 SHA-256: e9af24c86623bea5199d7b856f12404ecc0508a2bfcda96cffec043d4cf6840f
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though corrupted, contains text related to parallelograms and the wkhtmltopdf application, suggesting a lure document. The primary malicious IOC is the redirector URL, which likely leads 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.com/wix?keyword=parall%25C3%25A9logramme+diagonales+de+m%25C3%25AAme+l
    • https://cdn.shopify.com/s/files/1/0446/9525/7244/files/91384747425.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/software_development_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0446/4377/8723/files/18548319721.pdf
    • https://static.usrfiles.com/ugd/405339_1c39685a3d064c0eae2a8b8248acdb4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_62554cc13aa845dcba8afb20289ed26a.pdf
    • https://static.usrfiles.com/ugd/b8c837_83e4c4ebe5e248818274c52a61ffd01a.pdf
    • https://static.usrfiles.com/ugd/7603ae_9362030ac7f24d0ebfcf785ae90df159.pdf
    • https://static.usrfiles.com/ugd/3649d2_f41acb5adedc4d64ad7daa438264167d.pdf
    • https://cdn.shopify.com/s/files/1/0435/8891/1267/files/71603909558.pdf
    • https://cdn.shopify.com/s/files/1/0448/0742/2109/files/vigosipadowubenetile.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/are_y_all_ready_for_this.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/boat_browser_pro_apk_latest.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b97.bin
f49b297ea6fd05712595c17125f6f3567e27061d818688c501dd7493c7d7e3a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B97 5148 bytes
font_01_sfnt_off00005c5a.bin
64b3d158e6950b09f4b2008cca8270e2e8004bbd292056d6fe2714eadb59d8b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5A 10908 bytes
font_02_sfnt_off00007f93.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F93 4324 bytes