Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8aa7e864447706…

MALICIOUS

PDF

54.2 KB Created: 2020-07-08 14:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48c95488b19a3130b695afff64b78872 SHA-1: ebb8ee46b8e42756296148151f291b2357cbf47b SHA-256: 1a8aa7e864447706f47e4a12bc0dfa7dc8aef6e50cd2a94ff9906add56498429
160 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains hosting numerous other PDF files. One prominent link redirects to a known malicious redirector. This indicates a link farm or SEO poisoning technique designed to lure users to malicious sites. The document body, while containing garbled text, includes the title 'Gunnar myrdal an american dilemma pdf' and the malicious redirector URL, suggesting a lure to disguise the malicious intent.

Heuristics 4

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wb?keyword=gunnar%20myrdal%20an%20american%20dilemma%20pdf
    • http://files.therungururelay.com/uploads/1/3/2/3/132302999/kevumidigavimatif.pdf
    • http://files.crcofwm.org/uploads/1/3/0/7/130738501/lonebuforamu.pdf
    • http://files.thirdcinemaproductions.com/uploads/1/3/1/3/131379749/sonazez.pdf
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdf
    • http://files.farronengineering.com/uploads/1/3/1/0/131070112/zasoruzibopeku.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://files.ovationentertainmentgroup.com/uploads/1/3/1/4/131437648/8675108.pdf
    • http://files.nod-production.de/uploads/1/3/0/7/130776118/3864674.pdf
    • http://files.adelaidechickensittingservice.com/uploads/1/3/1/8/131857071/wovakemeluwo-bokevanukapaku.pdf
    • http://files.henestrosastudio.com/uploads/1/3/1/8/131871677/jezatawowi-jakomusixegepub-kuloxeku-zobuzujexi.pdf
    • https://kugigoke149047822.files.wordpress.com/2020/07/37976927540.pdf
    • https://viveriba.files.wordpress.com/2020/06/guxepoziloxazopowuvoz.pdf
    • https://lipimuz.files.wordpress.com/2020/06/setomolusezowakivigabeg.pdf
    • https://tijudemupox.files.wordpress.com/2020/06/mabozu.pdf
    • https://fatugapep.files.wordpress.com/2020/07/96974180892.pdf
    • https://zezupid.files.wordpress.com/2020/06/23165583903.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_off0000982d.bin
2738d43a6a8ad271fcca7c45f71d51b3f199aa790309597a503ce1331dcca8bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x982D 4948 bytes
font_01_sfnt_off0000a8ec.bin
b95b02351efd94b321dbfc44f34dc416f9bb74e469e45559b9e0aef425db535c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8EC 10276 bytes