Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa250e73f56cd8c3…

MALICIOUS

PDF

48.3 KB Created: 2020-08-30 14:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56b130efa78c86c7371012ea39d6100d SHA-1: 2c527e09afda813894d68f006a1bbf6ea20102e1 SHA-256: aa250e73f56cd8c33c1c3ba077746872df423caac0e00fe73ee1a9d3376ad454
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated and appears to be junk data, but the presence of the malicious redirector and the mass of external links strongly suggest a phishing or malware distribution attempt. No scripts were extracted from this sample.

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.com/wix?keyword=dead+maze+dog
    • https://static.usrfiles.com/ugd/b8c837_15b571ccc55447868505cbab9e834b35.pdf
    • https://static.usrfiles.com/ugd/b8c837_13c88426f0d94e63b2eba14d524863fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_f861ee5715104bb1bcc7f9945812e132.pdf
    • https://static.usrfiles.com/ugd/f46427_11e2943db2eb444f94d5588c7fb3e506.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdf2f87b1ad24e158f538882c5727b89.pdf
    • https://cdn.shopify.com/s/files/1/0439/2937/0779/files/24737371921.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4983/files/programming_in_java_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0462/2883/2405/files/frog_dissection_student_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/30043923033.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/biological_classification_class_11_ncert_solutions.pdf
    • https://static.usrfiles.com/ugd/b8c837_497dc99242c144dbba8b873bab2c1a97.pdf
    • https://static.usrfiles.com/ugd/b8c837_66738736f2ad4c5b98e62a0b1133a496.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_off00006905.bin
46277c141079ae247d9ec405030740101bf4fecfebe17d417bc319d23fc42b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6905 4888 bytes
font_01_sfnt_off000079a7.bin
875a9b79a062ef5dc639244c93382c025bcf4d47132d0a3b5ee7d605fe317603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A7 10352 bytes
font_02_sfnt_off00009d48.bin
4ffe5915cc4f87b5ad067155878d1e19500a11db5d5a49f2088ff8ba2bdade6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 16760 bytes

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