Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0221efd1e753ded…

MALICIOUS

PDF

65.0 KB Created: 2020-08-31 01:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08ca2e47e17cace741ad7ad600364ab0 SHA-1: e6ad331c0070232a29e48cfbdedc71e3517a7be5 SHA-256: b0221efd1e753ded2550caf9406389eb7ca8b1cab8e74250626092fe2beaedf9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a significant number of embedded URLs, many of which are part of a link farm strategy, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these URLs, https://ttraff.cc/wix?keyword=agar.+io+private+server++pc, is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but also includes the malicious redirector URL and several benign-looking Shopify URLs, suggesting a lure to generate traffic or SEO value, with a malicious redirection as the ultimate goal.

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/wix?keyword=agar.+io+private+server++pc
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/alkaline_vs_acidic_foods.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/xovepojofuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/cheapest_insulated_roofing_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/katuzex.pdf
    • https://static.usrfiles.com/ugd/b8c837_3516c67845fd40e2adecda447aa46ce6.pdf
    • https://static.usrfiles.com/ugd/f0e51d_73d36da4c8dd4b1fbca36bda78c31fcd.pdf
    • https://static.usrfiles.com/ugd/09273f_b6538076bd164e2fb5aebdce6927bbdf.pdf
    • https://static.usrfiles.com/ugd/73cb9e_474a1d61fd2b487f94b5cc6877d6627e.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/40385432446.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/email_providers_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/ximidubiwebetiloror.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0000cfaf.bin
46c7549b44cb898185ec8622f5802d66524eaf0a14512a0aa02c27d094e40367		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCFAF 21208 bytes
font_00_sfnt_off000067b7.bin
c6acebe3750ab55c09714fa1b34f6c70ddae3ce202e1a088ffcbc34adab53285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B7 6588 bytes
font_01_sfnt_off00007800.bin
cc1d6c7c9a96d83aebdd068e766cd214405efb17311f2c86bf7878a2b26cfed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7800 3732 bytes
font_02_sfnt_off0000849f.bin
b7329f426e49b88ac6c85fc338ee0bb3c4546196e6dc26de8f1fbcfda1655577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849F 5152 bytes
font_03_sfnt_off0000963f.bin
e4d2c796e2fa4bab888419100668b811b51031410f4037b9e7bd27bbd82f4050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963F 3488 bytes
font_04_sfnt_off0000a455.bin
43159f8ce236f5284234eb1b8cb0538ee97498b186cc08e048bb8ab6be53bfb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA455 13540 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.