Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae713bfd9d6318a4…

MALICIOUS

PDF

68.4 KB Created: 2020-08-29 22:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77bed5485dba4e8fd562956baaba41ac SHA-1: 2943caba6f78479b118c9019de42f90278f3d7e0 SHA-256: ae713bfd9d6318a4939fe1b749d5218fd314fba0e5f2989f6e34395b829ac07e
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a link to a known malicious redirector. The document also contains a large number of links to external PDF files hosted on Shopify, suggesting a potential SEO poisoning or link farm tactic to obscure the malicious redirector. No scripts were extracted, and the document body was unreadable binary data. The primary IOC is the malicious redirector URL.

Heuristics 3

  • 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.
  • 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=%25D9%2583%25D9%2585+%25D8%25B3%25D8%25B9%25D8%25B1+%25D8%25A7%25D9%2584%25D9%2586%25D8%25B3%25D8%25B1+%25D8%25A7%25D9%2584%25D8%25B0%25D9%2587%25D8%25A8%25D9%258A
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/98918051696.pdf
    • https://cdn.shopify.com/s/files/1/0430/3618/0634/files/the_cask_of_amontillado_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/timutofazem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/4261233505.pdf
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/hybridization_practice.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/traduction_anglais_franais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/mewafepinad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/best_riven_skin.pdf
    • https://cdn.shopify.com/s/files/1/0434/1664/9890/files/negative_effects_of_stress_on_academic_performance.pdf
    • https://cdn.shopify.com/s/files/1/0430/6436/1113/files/37250832507.pdf
    • https://static.usrfiles.com/ugd/b8c837_132628c7ef364e36a9117a681bf6acdf.pdf
    • https://static.usrfiles.com/ugd/8cbfce_95c036c756244289a3f65dd18ff9b7fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8e06fc5fe7142e8833420b4b276a4ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_b072c06d4a21493abc00cecbcca5bde9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0433/9335/1843/files/calendario_feriados_2020_argentina.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/nideliwogagopojogukarom.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/bupesizopatuwisekoko.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000cae2.bin
862633633f0fa43ece01f4c5c9666d821f78a2b08f675a2fa3e4770c84db92eb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCAE2 31500 bytes
font_00_sfnt_off000087af.bin
7ba3cb78c97c95740e56b821b2ff5122a41b23b522058b8ac94c5d9c7bcebed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AF 4068 bytes
font_01_sfnt_off0000958d.bin
5a91c2e4f10a550d95319425ae21dbe8d1c4813956189a1b99cba94f9b1cd389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x958D 17672 bytes
font_02_sfnt_off0000b01c.bin
8f99b0c161f801a5a0847759e174a850c05f1554ac3ccadc448762e080bc6cd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB01C 7924 bytes

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