Malicious PDF — malware analysis report

Static analysis result for SHA-256 b093a1d27d435b75…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 09:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8180d46fc964ec968bc4b1ff157d5035 SHA-1: 6d83d3c166828e3642443f4ac11bc89923baa12b SHA-256: b093a1d27d435b7555b4b52709bca1eafe6f751b38c844718c4064a0e8bf754b
120 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded links, with one identified as a malicious redirector. The document body text is largely garbled, but the presence of the malicious redirector and the link farm heuristic strongly suggest a malicious intent, likely to lead users to phishing or malware distribution sites. No scripts were extracted from this sample.

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=ventajas+y+desventajas+de+los+costos+predeterminados
    • https://static.usrfiles.com/ugd/51c472_b66a489d3f65443884b3226071ca7f1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_74ef12afff234ccaae618b61aebf2bca.pdf
    • https://static.usrfiles.com/ugd/c63dba_9b6ed78edc894cd7b8d17e1fcd6aa2b5.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_d7cc1a5fe3954aa3a91bbb767fd9651f.pdf
    • https://static.usrfiles.com/ugd/e1c37d_fc3dc1549105484cbc62438f2ab2833e.pdf
    • https://cdn.shopify.com/s/files/1/0469/0070/7490/files/tigebes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/7054751498.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/71575766372.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0011/files/simple_past_tense_irregular_verbs_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/0552/5661/files/37828967325.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/78364294515.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5883/files/49260322045.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/judefiwerowesapule.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/how_hard_can_idubbz_punch.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_off00005f64.bin
ddfcc6be143ca29c77e1900b1706707f25f1e3d8de66a383f298673374a70c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 5420 bytes
font_01_sfnt_off000071d4.bin
627026412324ede7dfb2854e6a5e53d5fa7ecea4a07359040de77872e5916106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 10768 bytes

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