Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04c0963ee539092…

MALICIOUS

PDF

39.3 KB Created: 2020-08-30 04:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c9bb0069de426480a6e763e81c34518 SHA-1: 70bae803512196941fa57962c07be051fc25b927 SHA-256: f04c0963ee539092ecd1b82c42642ef292a7ee790d22c7e5373c81725069246a
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ammo 18 nko test answers' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous PDF links points to a link farm or SEO poisoning tactic. No scripts were extracted, limiting the analysis of further payload delivery.

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.ru/wix?keyword=ammo+18+nko+test+answers
    • https://static.usrfiles.com/ugd/b8c837_4f7bb12d29b743c9abf28e12e6bdf93b.pdf
    • https://static.usrfiles.com/ugd/c7a620_38a9e3226aff481ea0e907f70151a9b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea766fa082de4f4b8f9cab86dc92a606.pdf
    • https://static.usrfiles.com/ugd/e32576_f54b1d9e03e043d4bff929c6f12d402c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/54030253425.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/1890683245.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9845/files/7443026826.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0561/files/filona.pdf
    • https://cdn.shopify.com/s/files/1/0440/6676/7013/files/16_career_clusters_survey.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/pasalodaxulal.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/california_apartment_association_lease_agreement.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_off00005c0d.bin
13d2d4f29eadaeb44cab2a94afc6be6f41fb10977121c5098895f3c0861fdf7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0D 5192 bytes
font_01_sfnt_off00006db7.bin
b68adf48d894aa88a370665743ca15e13f194d0defbf25cc287d4cbb58affbf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB7 10292 bytes

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