Malicious PDF — malware analysis report

Static analysis result for SHA-256 e089d1df661f3a99…

MALICIOUS

PDF

62.3 KB Created: 2020-07-31 18:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d45b6e61d24ecf81762ae6f8f814d684 SHA-1: 4834cf59fcd8b84e43e8ba05ab09ff84ba4a712f SHA-256: e089d1df661f3a99d4c4625e6ae746868ad450a89ecc5c9b05cc29c7792cd84d
152 Risk Score

Malware Insights

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

The PDF contains a malicious link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL and references to other Shopify URLs, suggesting a link farm for SEO poisoning. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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=book+and+quill+minecraft+recipe
    • http://files.fairtradeswansea.org.uk/uploads/1/3/2/6/132695329/73408d33b0.pdf
    • http://files.sillassenhalf.com/uploads/1/3/0/9/130969555/bevijidu.pdf
    • http://files.aireonebarrie.ca/uploads/1/3/1/4/131407918/12dd9a8fd84.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/zaxapez.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/digap.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/5578695879.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/wasub.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/79265224524.pdf
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/38789075944.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/filexesegifaxubiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/maxiwezixavexepajolise.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/24315856766.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/1403484219.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/jamifebuveporapuwux.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_off0000a834.bin
752a80212fab56329b460510cd030243753835edb0644d55a3d8ccbba86afea5
pdf-font-stream PDF embedded font (sfnt) at offset 0xA834 5244 bytes
font_01_sfnt_off0000b9ed.bin
ebf4fea09db7e73eb113128fffdb023a0924d5419cbd8d578c57616bde0e4506
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9ED 10632 bytes
font_02_sfnt_off0000de48.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE48 4324 bytes