Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d181945678a0fdb…

MALICIOUS

PDF

37.0 KB Created: 2020-09-19 03:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b314d2bea73c9dd88f7e4e7203eee6b9 SHA-1: cc520e00e8493e56b94ca6741cb0969ce2e40500 SHA-256: 4d181945678a0fdb9858ad746476bd9108ca0028cd77da142b5b18221f456040
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document exhibits characteristics of a link farm, with a large number of embedded URLs. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.club/wix?keyword=ceres+high+school+calendar+2020'. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or credential harvesting. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=ceres+high+school+calendar+2020
    • http://pumamole.danielvm.com/uploads/1/3/1/3/131383309/putanejipinoz.pdf
    • http://rasisafur.tkjceramics.com/uploads/1/3/0/7/130776795/355fa290b91ddff.pdf
    • http://lazew.eatyourheartoutsd.com/uploads/1/3/1/4/131483955/03e7bf.pdf
    • http://moduf.helpryansee.com/uploads/1/3/1/4/131453005/jadakine.pdf
    • http://kajuv.navigatemnsure.com/uploads/1/3/1/4/131437699/3472456.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5467/files/zofaxetenebamirobeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/anne_marie_ciao_adios_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/dark_souls_3_mask.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/youre_approaching_me_copypasta.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/american_english_file_level_5_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/vesaduzaxunotekowekesi.pdf
    • https://8ab2c224-ad7f-41e6-81b8-2e17c777668e.filesusr.com/ugd/8a4248_0fb65a0302a24cdb8024234b5f9fb0f1.pdf?index=true
    • https://2c476064-ac11-407d-8a94-0afa230dd037.filesusr.com/ugd/eb2f7d_863f5de1f20f4c419415a8adc42adf5c.pdf?index=true
    • https://05e452fd-5c15-4338-924b-c1b43469da4e.filesusr.com/ugd/ade4e6_79a9b331e50b4b60950bcd4dc5bbb438.pdf?index=true
    • https://537b8e78-a7f9-4650-8fcb-8e1d73cd32b0.filesusr.com/ugd/4f270c_d91b4a4fc257457eaef26f0ed4daf25e.pdf?index=true
    • 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_off0000519e.bin
be2c7f7ef2c4f96050ae769ef5535aedb8b7a14d6586ef520e4488c35593a674
pdf-font-stream PDF embedded font (sfnt) at offset 0x519E 5380 bytes
font_01_sfnt_off000063e3.bin
029325bf7aea91401a6b38309e2ee01769eab5682c1a717e24ce8d0df55b2b9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E3 10352 bytes