Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbd35c2b5510aa3…

MALICIOUS

PDF

93.8 KB Created: 2020-08-30 00:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c44c00971c0a087d6830b13d09db3d2 SHA-1: e1f919523f153b536ba6506d609b47fde94477c7 SHA-256: 7cbd35c2b5510aa3f49ae03a0d50fd3b5d9e05cf1d32cdcaad865141c8c21350
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to deceive users with promises of prizes or funds, requiring them to interact with the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=gundam+seed+destiny+43+english+dub
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/51586110657.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/pagazumudijawawiweluk.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/limited_edition_journal_3_blacklight.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee278d4c0ec341bb9db7c95ae722fed1.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_ebbc868fc3754a0996898152009363f7.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_c8a6a35a13554965b0e8c120d7203d47.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_5e350bb09da242acbec5b986a111de0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_345a2890becb4ebc98417d0748cca333.pdf
    • https://static.usrfiles.com/ugd/2ca09c_012fa0faef504ec783c3a3969173a931.pdf
    • https://static.usrfiles.com/ugd/9f6a24_85bbe32c13a743d6bba5c569b54664d5.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_off0000d1af.bin
f08ad0f940f7a4c778015ebb95acf772d459afcaa86716846db9a5da55e7cbfa
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AF 29420 bytes
font_01_sfnt_off00012de5.bin
1a0ac40635557680371e887ed3dc38129c890062580bb461ed7e63026af00057
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE5 5668 bytes
font_02_sfnt_off0001411a.bin
4621c8640712cee95fa44bba6e29a374fb7d687dc728c51b40cf27cc1e2e155e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1411A 12372 bytes