Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d0dd0740c298b3…

MALICIOUS

PDF

48.1 KB Created: 2020-07-31 12:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8536910ab717b395b9a5e8e32b442cf2 SHA-1: 2b53fd83cdb0f941e012d429be8bed3b36a2319c SHA-256: 96d0dd0740c298b360892e66e4aff84f43955454473e358c4a72887a5a6c7570
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms designed to drive traffic to malicious sites. One such link, 'https://ttraff.ru/pify?keyword=bjt+characteristics+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bjt characteristics pdf', suggesting a lure to disguise the malicious intent. The file's structure and the presence of multiple external links point towards a campaign distributing malicious content through seemingly innocuous PDF documents.

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.ru/pify?keyword=bjt+characteristics+pdf
    • http://files.prodigydanceandperformingarts.com/uploads/1/3/0/9/130969985/dofefoxi_juwafefum.pdf
    • http://files.laughterandlove.org/uploads/1/3/1/3/131398374/buteruku.pdf
    • http://files.coloradospringsspaandsalon.com/uploads/1/3/1/3/131384214/gufevizakobidis-takitabadit-xerikugorugemel-roxinijopifeva.pdf
    • http://files.allskillsenglish.com/uploads/1/3/1/8/131872079/e50fa998.pdf
    • http://files.pro
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdf
    • https://cdn.shopify.com/s/files/1/0440/3652/2149/files/86776696685.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/42339755333.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/30917104027.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4149/files/ropoxewepiwuxudasuwodar.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/kudigizojalotuzexedaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/6747108819.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/55242100943.pdf
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/labulufumopefibowesapubeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/fedopixugomorusujeb.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_off00007ff8.bin
5c84d1d882249267284d4961372b5c952483d5701b9bcc72e384a24df1e1702a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF8 4908 bytes
font_01_sfnt_off000090c1.bin
c2b7b3eb6aa0c43d3289abfc5c6c4468574e387699c02c44f356b464b1e5af34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C1 10180 bytes

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