Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc0c4aacabdd523…

MALICIOUS

PDF

89.9 KB Created: 2020-08-04 22:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c726ac1af640f89df3858598911aa3d9 SHA-1: a00e0637f261e0c604424662568487c330bd81c9 SHA-256: edc0c4aacabdd5239f9318ca22ca4e2f95d94e89369c606211ba90e008147604
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a manual for Microsoft SQL Server Management Studio, but the primary link redirects to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link-based lure. The document body contains obfuscated text and the malicious URL, indicating an attempt to trick users into visiting a harmful site.

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=microsoft+sql+server+management+studio+2020+r2+manual+pdf
    • http://files.lanagates.com/uploads/1/3/1/6/131637919/sakugome-sesokuz-juzel-mizokewe.pdf
    • http://files.mariesplacemusic.com/uploads/1/3/1/3/131381799/zixizake.pdf
    • http://files.springphysio.co.uk/uploads/1/3/1/1/131164440/924671.pdf
    • http://files.thebreakwaterinn.com/uploads/1/3/1/4/131453453/jebutusokuvuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/purudimapesojuvexakejim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/58447564484.pdf
    • https://cdn.shopify.com/s/files/1/0428/7925/4694/files/gofewizizewadej.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/remikularuduzelap.pdf
    • https://cdn.shopify.com/s/files/1/0434/0255/9655/files/memazazufiselefex.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/xulejekepuke.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/61741181463.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/18761320892.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/nawixiji.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/2020_buell_1125r_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/15081802496.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/45593317857.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/67762340320.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_off0001128a.bin
7eaf5c6ed327b39d4a958e64fa6d2655b018e99eff93b0191e182f9e55bc3397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1128A 5940 bytes
font_01_sfnt_off000126b7.bin
5faf23083e90e721f6027a41478d20a857cc1deee8a2ef6693b1768a304f5d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126B7 16508 bytes

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