Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05cbb23a8c57a9f…

MALICIOUS

PDF

121.9 KB Created: 2020-08-04 19:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adfd128b693c54fcb92b343ab7b96363 SHA-1: 67944b245216739ed4506aad3a7d6ef1de938d3b SHA-256: e05cbb23a8c57a9f49ee56f30b2c311db65e5563a1ceccaf92792c6ebe4a82ca
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to lure users to a malicious site. The PDF also contains a mass external PDF link farm, further supporting a malicious redirection scheme. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=business+basics+new+edition+teacher+s+book+pdf
    • http://files.wyomingincolor.com/uploads/1/3/1/8/131856176/tidef.pdf
    • http://files.hollytilley.com/uploads/1/3/1/3/131381031/sakuvinituwilezez.pdf
    • http://files.schumacherbrothersfencing.com/uploads/1/3/0/7/130738732/247995c0f3e552.pdf
    • http://loreg.inkmagazine.org/uploads/1/3/1/4/131437987/lemafu_tevev_zopixudik_genogubixemina.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/28747195015.pdf
    • https://cdn.shopify.com/s/files/1/0428/6965/3663/files/java_random_number_between_1_and_100.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/kowoxenizenodulufaguvo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/vovobu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5561/8977/files/3956484875.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/58230241248.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9550/files/warogeturorofikewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/jegevogugizukup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/lebuwigaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6959/files/84134851005.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/zubijimulem.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_off000191c1.bin
0338402abfa64ac38ed09f3e35cb1e77c8597d430f4fda5d2d1c277deaaab385
pdf-font-stream PDF embedded font (sfnt) at offset 0x191C1 5440 bytes
font_01_sfnt_off0001a437.bin
f709db637b9dd9c9d1c19e508ef7f30af30b4b14c42a08a7c33b83ef39a9fb5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A437 11556 bytes
font_02_sfnt_off0001cb72.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB72 4324 bytes