Malicious PDF — malware analysis report

Static analysis result for SHA-256 1503e00a71dd9cc3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 03:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9082ad889b5a9b4677f8d1ecf4984c0 SHA-1: 0725b49954aadc5140e988959e52a9b24fce7810 SHA-256: 1503e00a71dd9cc3020e46cbe013be41c3a521ee34fdf561833c9ebb1f14c22b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for a free download, which redirects to a malicious URL (https://ttraff.cc/wix?keyword=adobe+pdf+free+download+install). This is consistent with an advance-fee scam or phishing attempt, likely leveraging a client execution exploit. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.cc/wix?keyword=adobe+pdf+free+download+install
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/25130902632.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/calistenia_mujeres.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/84475048265.pdf
    • https://cdn.shopify.com/s/files/1/0436/5628/2265/files/15748816502.pdf
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/agricola_family_edition.pdf
    • https://static.usrfiles.com/ugd/9c43ec_5904d8f9c3414fa5a0058724d8ec4d86.pdf
    • https://static.usrfiles.com/ugd/eaf48f_4e28a73a731949f78ff9cfdd808e3dfb.pdf
    • https://static.usrfiles.com/ugd/69695d_182c8f8d4c2741e797fdd9419fbca01c.pdf
    • https://static.usrfiles.com/ugd/868401_94644b9e4f2a4f0eabc2559f990b7b93.pdf
    • https://static.usrfiles.com/ugd/9ea91e_27be3559339649feb9f490a461bc287d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7961010fbdc144ed9dc4f887a7518817.pdf
    • https://static.usrfiles.com/ugd/10e3af_4c5a9f1f87594fe3a32435ea679ec625.pdf
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/1359935703.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/mewusaradinexivogademun.pdf
    • https://cdn.shopify.com/s/files/1/0445/3364/5476/files/introduction_to_biblical_counseling.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_off00006ad8.bin
d0fb846ad3730becc2eca06f2d0335d2d56da45c38d46515f53427ce68a15e28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD8 5256 bytes
font_01_sfnt_off00007cd0.bin
280e50957633f3b585ca7c9da47052ce722229b74ab2534ac580dbfcb2cfd08c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD0 10096 bytes

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