Malicious PDF — malware analysis report

Static analysis result for SHA-256 018215f923ba4bc8…

MALICIOUS

PDF

47.3 KB Created: 2020-09-19 19:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73bf2c1fd1bcfb28597a8fc6eccc62b2 SHA-1: 13b128ab1a49f5c1f8c08275dffc6112f59f93ac SHA-256: 018215f923ba4bc8e70532214b42ec3f83461b3156a99eb0bc14b2e103b3e51e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, which is part of an advance-fee scam lure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=god+bud+strain+flowering+time', indicating a likely attempt to direct the user to a fraudulent site. The presence of numerous other PDF links further supports the classification as a link farm for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.club/pify?keyword=god+bud+strain+flowering+time
    • http://files.maddysmusicstudio.com/uploads/1/3/1/4/131484029/6814521.pdf
    • http://tupuxemi.veilliestarrcomics.com/uploads/1/3/1/4/131454536/bufuv.pdf
    • http://lujet.chefdavidbmorrison.com/uploads/1/3/0/7/130775195/783457.pdf
    • http://daxer.allentertainmentuk.com/uploads/1/3/0/9/130969699/97423d4.pdf
    • http://files.weavevirgin.com/uploads/1/3/0/9/130969775/gemuxaxopifage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://03b838d3-603c-4d2b-aafe-c680e3a8b6b3.filesusr.com/ugd/a382ee_f1317f47e1444da78717605fec1efdc1.pdf?index=true
    • https://413d6e9d-8581-4c03-b919-d2c17e0627a3.filesusr.com/ugd/0df15e_aea27d66730a4730acd77327482315b5.pdf?index=true
    • https://e5ec2d24-02f9-4e61-b0c9-3a93db0598d9.filesusr.com/ugd/50c35f_61b490db5dc948f19c3d831cf3a07f49.pdf?index=true
    • https://187d8e4c-1cf5-48cf-b6b2-425bb605df03.filesusr.com/ugd/516793_b44014c22fc24a618821cbe784bbdffc.pdf?index=true
    • https://cf85c5bb-a87b-4210-b50b-c9ffdb70647d.filesusr.com/ugd/84a5c6_f456931e0e2c4ae9964367cc7662e776.pdf?index=true
    • https://6be558b0-da87-4418-98fc-d5d6967dff9b.filesusr.com/ugd/77eba6_63a368258d2047898c55df7773861e4c.pdf?index=true
    • https://ade91eb6-fdeb-4137-9060-1ac5117ea67f.filesusr.com/ugd/9b2d9b_ac1a34e8a1d64a2aa2137107a44ea466.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/4431/5040/files/wabalijotugesefeja.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/likelufoteba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da4.bin
b7dfed2b6263c8437b0c2beb59fd86e1ce92c2fd422c71948afaced02129f81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA4 3360 bytes
font_01_sfnt_off00007992.bin
0738b34a748197e8417e75ceb12c07ceae2c3e8bf2f451ff0b241f2790ebf54d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 5492 bytes
font_02_sfnt_off00008c39.bin
b492d51e2c34c6eac9e67a3ba62dc56d5e6d3c27cddea3d8c4a8a76226909544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C39 10624 bytes

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