Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f03ab04dee77d5…

MALICIOUS

PDF

53.4 KB Created: 2020-08-31 03:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a553d0b5d861fb25e414261fdb669214 SHA-1: 1ea2f071943d54586f5d0806882c40aa654ac779 SHA-256: 26f03ab04dee77d53d96a8c89653ca338882f2afdc1c644149875657ca6b4892
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a link farm or redirection tactic to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=zion+lutheran+church+corvallis
    • https://static.usrfiles.com/ugd/ba3095_0c9bbe55485a48a3a2fec1a925f5100f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e0f500d713148e38461148786b0980f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9dd6113809a4788a1558277233cf625.pdf
    • https://static.usrfiles.com/ugd/d162e3_ae7b257a4970408c9d0dffa5bd94e2d5.pdf
    • https://static.usrfiles.com/ugd/de60da_7ebbc651f18f4d5684182e94f7cfa5f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a00b39fa349240669eb7eb1927b1ac20.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_700cfc27152f473ba449e7d98d5b04f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3954f0b56d548478077c4952f816435.pdf
    • https://static.usrfiles.com/ugd/12745a_43506f3a702446b8abb58870dbf73da2.pdf
    • https://static.usrfiles.com/ugd/b8c837_de221f358af14cefb7bdd19a92485e94.pdf
    • https://static.usrfiles.com/ugd/33a2e4_c4e4c158a57045b28aad27f01c026ff7.pdf
    • https://cdn.shopify.com/s/files/1/0437/6487/5418/files/ecological_succession_scenarios_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.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
font_00_sfnt_off00006c17.bin
07d86c6ef12656d8aa67d57e825d66d26d5b3ac8d648be260b570f00f01de379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C17 4904 bytes
font_01_sfnt_off00007cb1.bin
6cc48117976100e495d87899bb7170f7e874ab931bd184aacf6b6c3c9701773f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB1 4876 bytes
font_02_sfnt_off00008e62.bin
f639b11b3e12badec89e4eabf957651ccc14dd6e4661188d8670ffe75b9d8c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E62 10616 bytes
font_03_sfnt_off0000b2b0.bin
4da05b0578d34eab3ca8a2849713c096bf6d9f8a5d51f52bef1b33c921ec0663		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B0 16348 bytes

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