Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ed873c85217551…

MALICIOUS

PDF

47.1 KB Created: 2020-07-07 11:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f058ee8fc06274e82ac5fb7772375bd SHA-1: 45976800807576f16e8f180d2441ccf8854fe29e SHA-256: a9ed873c8521755112b556f8d18bb61156282e445c2494341507ad60819892dd
140 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, including one to a known malicious redirector at `https://ttraff.com/wb?keyword=pdf%20viewer%20app%20android#pdf+viewer+app+android`. The document also impersonates a signing service, likely to trick the user into clicking the malicious link. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt to improve search engine ranking for malicious content.

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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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/wb?keyword=pdf%20viewer%20app%20android#pdf+viewer+app+android
    • http://files.imarsonline.com/uploads/1/3/1/3/131380413/6c76ebc2.pdf
    • http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdf
    • http://files.reikifortheplanet.com/uploads/1/3/2/3/132302815/5645773.pdf
    • http://files.cninc.org/uploads/1/3/2/7/132740479/5324237.pdf
    • http://files.support.famhealth.com/uploads/1/3/1/4/131437740/3357936.pdf
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdf
    • http://files.sproutsmyanmar.com/uploads/1/3/2/3/132302863/giburapudiga-dojowul.pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://files.rabbitmountainlavender.com/uploads/1/3/0/7/130738625/futevukumuj_lulamatix_libujuferebetux.pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • https://wigilisumi.files.wordpress.com/2020/06/fowefaxanab.pdf
    • https://fanutuzak499104460.files.wordpress.com/2020/06/zowefudepedapik.pdf
    • https://vuvogol.files.wordpress.com/2020/07/47928224801.pdf
    • https://vosafeviba.files.wordpress.com/2020/06/fakavilufufepilarel.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_off00007c77.bin
5a79effbab8381b255ab0c99bc6cd3db207a1aea23bdb881034911404a8fee32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C77 4688 bytes
font_01_sfnt_off00008c77.bin
33ef2d01a7340ea6987e97e0a50f95c1679516cec2eb21b1e2318024fb497f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C77 10328 bytes

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