Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a5fa859b227836…

MALICIOUS

PDF

37.3 KB Created: 2020-08-08 16:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b093129b2ebf5faf62d0519c658960a SHA-1: 68d2a92c85bc0d86a55e55f7034f4b108d48136f SHA-256: 32a5fa859b227836b2641666b6c203c87df4cc3b40a0e00bc0767af654a718e8
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to known malicious redirector infrastructure. Another critical heuristic, PDF_SEO_LINK_FARM, confirms the presence of a mass external PDF link farm. The ML classifier also flagged the document with high confidence. The primary malicious activity appears to be the creation of a link farm, likely for SEO manipulation or to host malicious content.

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=atul+prakashan+books+degree+pdf
    • http://files.lesanelesesneunited.com/uploads/1/3/1/4/131453401/sowiseju-javijibufo.pdf
    • http://files.vigocountycrimevictimassistance.com/uploads/1/3/0/9/130969562/boxepebesazelumef.pdf
    • http://files.simmons4house53.com/uploads/1/3/0/7/130740571/0f92152285bd6.pdf
    • http://files.kenanleparc.com/uploads/1/3/1/3/131398091/kopebitifi-lalal-napagojibep.pdf
    • https://cdn.shopify.com/s/files/1/0434/4558/4033/files/jimmy_howard_contract.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/demege.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/wafijizaveka.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/vokadigosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/maytag_performa_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/4658476069.pdf
    • https://cdn.shopify.com/s/files/1/0438/5731/3957/files/basic_life_support_manual_american_heart_association.pdf
    • https://cdn.shopify.com/s/files/1/0436/1394/6018/files/gotomibozokuxukogim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/64111725556.pdf
    • https://cdn.shopify.com/s/files/1/0437/8974/6337/files/lil_wayne_carter_2._zip.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/dibebevidevigumenilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/50498464612.pdf
    • https://cdn.shopify.com/s/files/1/0433/8230/9029/files/sumagaxivorulejeterexom.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/gejosavojusitarux.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3920/files/maxawudunux.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_off000051e3.bin
977124d824da73474da10de8c424c0eb1e434862a42d1cd83a1381d483712703
pdf-font-stream PDF embedded font (sfnt) at offset 0x51E3 5496 bytes
font_01_sfnt_off00006489.bin
201553ffc53f1b45a0147c644cf33ce8066dc5c4534cdc40486ff84e13563644
pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 10468 bytes