Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e294256a12c2b1b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 16:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8310ed02356815e595829c4c101e4539 SHA-1: 66f248abcdc9d1e5c9b644be419253924c8f0e72 SHA-256: 3e294256a12c2b1b99469ac2ef1245a866a9c2244ee18720d52c7413b74293d4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, however, directs to a known malicious redirector at 'ttraff.cc'. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious content. The document body itself is heavily obfuscated and contains the malicious 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=particularly+vulnerable+tribal+groups+pdf
    • https://cdn.shopify.com/s/files/1/0466/2758/6213/files/revista_atualidades_2018_2_semestre.pdf
    • https://cdn.shopify.com/s/files/1/0467/7795/8553/files/farikudosademudopedemure.pdf
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/70659909047.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/lufikimazaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/relevotaj.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6f01d067cf54a63b6bc79927bb47493.pdf
    • https://static.usrfiles.com/ugd/b8c837_666dccc875de4a9b890f7e5c2c0f4a59.pdf
    • https://static.usrfiles.com/ugd/b8c837_31acf244f30c48d9ba84016a7ceea100.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/guberiperuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/11263277370.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/4th_grade_gifted_math_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0440/1650/0886/files/levebekulanorizomugaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0438/2280/9250/files/xumakekamudowejeje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/280680.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/20976272901.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_off00006768.bin
db3653b97143a60d7e6048188b10344308e08655ea1075f5098c1fcf5e25747c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6768 5628 bytes
font_01_sfnt_off00007a9e.bin
dbaee609c8a84bf4197ad85b3969362dba1eab321aa58a78f1b0ada00c0d9bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 9908 bytes

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