Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a6f6fc12e143f8…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 15:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae4b0f7cdf2356fd62841d5c23e07e11 SHA-1: c5ce198f773e5556aee5508ab1f735ee1e15bda8 SHA-256: 52a6f6fc12e143f858c7afe8a8db59e7f58d1caa9df43632fc3fb1b49939e11d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=addition+facts+0-+5+worksheet'. The document body, though heavily obfuscated, contains references to this URL and a large number of other PDF links, suggesting a link farm or redirection strategy. The primary intent appears to be directing the user to malicious infrastructure under the guise of an educational worksheet.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=addition+facts+0-+5+worksheet
    • http://files.donaldunger.com/uploads/1/3/1/0/131070294/fazigev.pdf
    • http://files.torquemetals.com/uploads/1/3/1/6/131606822/c96e40efc4aee88.pdf
    • http://rapafijuz.berkshirepsych.com/uploads/1/3/1/6/131606174/pufakex-dibalifi.pdf
    • http://files.bigbearboardshop.com/uploads/1/3/1/6/131636612/pixuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/22983449580.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9212/files/totozokepizipa.pdf
    • https://cdn.shopify.com/s/files/1/0439/2825/6680/files/52781619858.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/3288793904.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7984/files/zebidamiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/70065178410.pdf
    • https://cdn.shopify.com/s/files/1/0437/9164/6880/files/11212403675.pdf
    • https://cdn.shopify.com/s/files/1/0449/5143/7480/files/37322177310.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/titewilegonegedupegilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/naraduzemifonipijabemowin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/85961254160.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_off00006495.bin
6a9dfac4d03e71c342a69d051b2b83e24d6d4caa7849948243168aede0e53415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 5520 bytes
font_01_sfnt_off0000776e.bin
91d388614e28014e88652e9627caa8a50d2855c1885dece5c62fe9386f4455a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10100 bytes

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