Malicious PDF — malware analysis report

Static analysis result for SHA-256 b337ebe8f312f5bd…

MALICIOUS

PDF

36.0 KB Created: 2020-09-02 00:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5700fb0f8c0a305809db91adbe8c809 SHA-1: 09277570b18dabd49ef9d26b7353c4817f6ae51e SHA-256: b337ebe8f312f5bd5caadd34f4c42111fdc7be51b7d75f1165d9ba325cfb55c1
152 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though corrupted, contains the same redirector URL. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger link farm, likely for SEO poisoning or distributing malicious links. No scripts were extracted from this sample.

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.cc/pify?keyword=weather+report+in+bangalore+today
    • https://static.usrfiles.com/ugd/ae15ca_934d70b55bc646358080594ba811e307.pdf
    • https://static.usrfiles.com/ugd/739437_76aa46723f6f4722a4c0057674f2a50c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ea1c3959d844548b409d93a3d539406.pdf
    • https://static.usrfiles.com/ugd/0b46e6_b0c4684cb5974ce1b875eb1e10f6935e.pdf
    • https://static.usrfiles.com/ugd/6f53d7_11ee2f6febe04f48acb4fe1450d9256e.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/gogokixaxokateveraz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/bedoruriromezijeled.pdf
    • https://cdn.shopify.com/s/files/1/0441/0517/1096/files/keysight_power_supply_selection_guide.pdf
    • https://cdn.shopify.com/s/files/1/0450/8614/6712/files/edexcel_chemistry_data_booklet_ial.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/banegu.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_3f07ef11d20f497d9c29c0118af6c532.pdf
    • https://static.usrfiles.com/ugd/e643da_ee81c335dbc74a238fa6ca6cf439251e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5109253166b049b291c4531faa663632.pdf
    • https://static.usrfiles.com/ugd/9e41f0_e44b55debf484a5fa3ecdf7d33627e31.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_off00004e06.bin
8300e34400bb8b04a9fdee97ca0bff04b99c25e058fe693cd53945d545241fb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E06 5296 bytes
font_01_sfnt_off0000600f.bin
09a97de5c521dd3e341b90f143004bbd22bc0620a2b3d44cb32f744f8f5901a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 10328 bytes