Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd6b8e871cbe5dd…

MALICIOUS

PDF

61.7 KB Created: 2020-10-27 02:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc59d1c6205c2ede89deabca04ca6e28 SHA-1: ec30ecbaadd0884dfff10c8c30d4dc3ce2fc6666 SHA-256: 9fd6b8e871cbe5dd87be617ae5639e65e93e08668defe9362f5320528035c4b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/123?keyword=flix+brewhouse+albuquerque+captain+marvel', is designed to lead users to malicious infrastructure. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm tactic to obscure the malicious destination. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/123?keyword=flix+brewhouse+albuquerque+captain+marvel
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5f93a2b4d6c66.pdf
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8aa8b2267ac.pdf
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f909c89b077e.pdf
    • https://cdn-cms.f-static.net/uploads/4421210/normal_5f974e523741f.pdf
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f8dab0144039.pdf
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8e46a98abf4.pdf
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5f94176048efc.pdf
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f8f3ce51ee59.pdf
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f89e61093675.pdf
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/kalunasegove.pdf
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/puxebunedofe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a8d489b5-8787-4cdc-8ee5-0d231f43b9f1/43492807053.pdf
    • https://uploads.strikinglycdn.com/files/1c50317d-93bb-4cd4-b3c3-cd288935325d/24388637385.pdf
    • https://uploads.strikinglycdn.com/files/7f0e473f-6b48-4cf2-adf9-795b42a1a267/hp_laserjet_2550_driver.pdf
    • https://uploads.strikinglycdn.com/files/b268da65-4ff9-4d9a-b76e-170beeaa4d46/tunaretizigamatefuvuval.pdf
    • https://s3.amazonaws.com/pegek/ligeposara.pdf
    • https://s3.amazonaws.com/risisipajole/bikeve.pdf
    • https://s3.amazonaws.com/tadovu/sirefulexorevezov.pdf
    • https://s3.amazonaws.com/bubisifapagefe/16292837564.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b32c.bin
e60df5d1efdbb3f99f188c4279540ed83a2c2c2c07d0e0108ecdd13b1fcd8908		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB32C 5612 bytes
font_01_sfnt_off0000c631.bin
84aad67ab60a3bc715dfe072e26222c3a93704fd2741f95ba919168b4dd58266		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC631 10192 bytes

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