Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea911f30d4fc0fc…

MALICIOUS

PDF

57.0 KB Created: 2020-09-16 12:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 345890cc4d70f682e0bab41384086caa SHA-1: 05a655f6a73385506ab3597f6039d8ec23aa0180 SHA-256: 8ea911f30d4fc0fcd7c00338946c7f1442e5b8f1454a5e878a3549640f4f865d
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to a malicious URL, indicating a phishing or scam attempt. The primary malicious URL identified is https://ttraff.me/pify?keyword=dell+changes+business+strategy. The document body, though heavily obfuscated, contains this URL, suggesting the intent is to trick the user into clicking through to a potentially 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.me/pify?keyword=dell+changes+business+strategy
    • https://static.usrfiles.com/ugd/2486b5_491fe6ce7aa54a4f9b86399cf7cda974.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_9cc5c319a37d4a42b0c2b9fc861e64db.pdf
    • https://static.usrfiles.com/ugd/c162b3_a19fc17fe6a74fcd9f1882181f66f2b9.pdf
    • https://static.usrfiles.com/ugd/4d400c_a65d3db1449549cf921715a1dd4e85d3.pdf
    • https://cdn.shopify.com/s/files/1/0437/6422/0055/files/blogger_collaboration_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/adidas_brand_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/ashirvad_upvc_pipes_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6821/files/iso_bootable_dvd_burner_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/19713026085.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/zetoxoda.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/1080335730.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/95037876591.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6590/files/guidecraft_kitchen_helper_coupon_code.pdf
    • https://static.usrfiles.com/ugd/87a178_819868f1e6a14e5f931739a6ac949a55.pdf
    • https://static.usrfiles.com/ugd/a31856_00617fbab8ff43ce8eafb7464dae9bec.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_off00009465.bin
d3e8b63cff73d87bae89a2d91428f062b02caec8e9d21120e4c36c961e316b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9465 5072 bytes
font_01_sfnt_off0000a5a6.bin
36b5390753932d9b45e9480c08fc0ee877bec6f793da6a029150b9c2c73c288a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A6 10312 bytes
font_02_sfnt_off0000c8d6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D6 4324 bytes

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