Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ec23011f3c5c4f…

MALICIOUS

PDF

52.6 KB Created: 2020-09-08 05:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f444acbb8b6da3f5faf6add9c1c4dd7d SHA-1: 8d67a6ae65495fb71d61ca8680ea5ed2069d2ce0 SHA-256: e9ec23011f3c5c4fd28641c3cce2d65afe72088bbcd9a0688af3443f88210b25
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.me/wix?keyword=new+software+for+ipad`. This URL is presented within the document body as a lure for new software. The ML classifier also strongly indicated maliciousness. The document appears to be a phishing lure designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.me/wix?keyword=new+software+for+ipad
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/knights_of_pen_and_paper_2_crafting.pdf
    • https://cdn.shopify.com/s/files/1/0429/0828/7132/files/40159284696.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/duxuxugemigamiwixu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9610/5375/files/24988209884.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/necta_go_tz_psle_results.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/cisco_packet_tracer_for_windows_8._1.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4602/files/nuxixonobapumopelik.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/kofubiwavewara.pdf
    • https://static.usrfiles.com/ugd/23e9be_fdaa6616aa9949debbd19a4ad8ab10a6.pdf
    • https://static.usrfiles.com/ugd/73c254_c89fdff4e53b4535997e809a4ab434b3.pdf
    • https://static.usrfiles.com/ugd/4117a9_ae0b41e4d4ad4a7199c3e53145a855ed.pdf
    • https://static.usrfiles.com/ugd/5af86b_a19d23da3428478e9c9271141f7277db.pdf
    • https://cdn.shopify.com/s/files/1/0464/8465/2184/files/nvidia_graphics_cards_ranked_by_performance.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/65252753911.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/lolatijuzikifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/juniper_certification_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/avernum_escape_from_the_pit_guide.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_off00008d2d.bin
732cc981ff3c88a2f21e63a4fe58ba275933ac9edc215cce2ae83de72d377cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2D 5064 bytes
font_01_sfnt_off00009e8f.bin
b90c7408a72679bb1c963f05b46b055956334f82957b1e86c5d466ebad447ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8F 11652 bytes

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