Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0fb8ed913c18fa…

MALICIOUS

PDF

57.7 KB Created: 2020-09-02 17:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6a2637bcabc28968cfff0e99f3db11b SHA-1: 9ed44c72f053cf8214bb703bcb9667c664375f20 SHA-256: 0d0fb8ed913c18fabd1b64a0870d10ea0d4ee06e1c5fd0c3ac03afd6a41b9cad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous embedded URLs, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to expense reporting software and includes the malicious URL. Heuristics indicate this is an advance-fee scam lure, likely intended to trick the user into visiting the malicious link.

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=expense+reporting+software+comparison
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0466/3443/4725/files/water_cycle_information_for_class_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/antologia_potica_cecilia_meireles.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/temporale_prpositionen_bungen_a1.pdf
    • https://cdn.shopify.com/s/files/1/0430/8215/4135/files/accounting_principles_and_procedures_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/botw_on_pc.pdf
    • https://static.usrfiles.com/ugd/3c9ac1_115f3fdbb48b4262ae7504ecc2168291.pdf
    • https://static.usrfiles.com/ugd/b8c837_921654c3efc74268b9a6c37817a04f38.pdf
    • https://static.usrfiles.com/ugd/724bd4_011d2ad9d5164761a4db53ec6b4c1be4.pdf
    • https://static.usrfiles.com/ugd/4117a9_6acb74bc09184b9283e57a674c6c81e5.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_b67993e5872044ceb980f46d196ee867.pdf
    • https://static.usrfiles.com/ugd/cafc24_b27f245100944f6a95d36e3a59abd623.pdf
    • https://static.usrfiles.com/ugd/7e6083_c6893b93d86e41b081e2618e0d191e3b.pdf
    • https://static.usrfiles.com/ugd/787b0a_7ba2116325a540f48f392975cf4b5b69.pdf
    • https://static.usrfiles.com/ugd/1c8c1e_79b78460c55d4fa990ee6695415823a1.pdf
    • https://static.usrfiles.com/ugd/e2b09b_a45d2f7893614ca8a04b3f21d09dd138.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_off0000a393.bin
194103c19bdf5652ae0e8c2f4e8bfb935dde6c6c875fdf07a81bef8e816631bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA393 5420 bytes
font_01_sfnt_off0000b610.bin
e03e1e20a853dbd51f9e569036ee28d575bd47fad70b4a7d4b0c16059efd02af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB610 10420 bytes

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