Malicious PDF — malware analysis report

Static analysis result for SHA-256 3738e22ce64411b7…

MALICIOUS

PDF

54.3 KB Created: 2020-08-31 22:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1686f52ef1d3b827d04e670e25e6d6e SHA-1: 992978aa004b8e4bd8ee9910a333a0810b86113e SHA-256: 3738e22ce64411b70e298a0c30c2e17c3a85f7eb657b93ffb6851691bf4c81d9
150 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, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. One of these links points to a known malicious redirector. The document body contains garbled text but includes the URL 'https://ttraff.cc/pify?keyword=c+error+lnk2019+template', which is flagged as a malicious redirector. The presence of numerous links, including one to a malicious redirector, suggests a malicious intent, likely for SEO manipulation or user redirection.

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.cc/pify?keyword=c+error+lnk2019+template
    • https://cdn.shopify.com/s/files/1/0439/6787/3182/files/betadasitazij.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/54672091967.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/el_tres_de_mayo_goya.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/febijopakadidukof.pdf
    • https://cdn.shopify.com/s/files/1/0438/0141/1744/files/pathfinder_kingmaker_scaled_fist_build.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/tipos_de_acretismo_placentario.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/93432416007.pdf
    • https://cdn.shopify.com/s/files/1/0434/0747/4844/files/atletismo_pruebas_de_pista_y_campo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3941/4677/files/59580335460.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/48607779121.pdf
    • https://static.usrfiles.com/ugd/b8c837_1353e6e07bad48c5b2d358914f14a1f0.pdf
    • https://static.usrfiles.com/ugd/eda9ba_472ff78dc65c475ea4e1e26e5865f5c2.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_cc6b6752019541b393e53762f0adfd59.pdf
    • https://static.usrfiles.com/ugd/9c0842_f7a60005577f42dca3ecfe8b0e15efc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_826862b38dcf4198a515204c0634ecba.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/tet_2020_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/pebugokozitipipediperej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/laugh_it_up_fuzzball_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/31414810317.pdf
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/barnstable_county_probate_court_forms.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000857e.bin
dfafb717c8ad9a91562c29952290b1397311514ed37fcd9c8a4bfcc74c83c230
pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 5236 bytes
font_01_sfnt_off00009733.bin
f27ef5374384813bea105a8c88abb29729d8ec023a366e5c91328e542bad9651
pdf-font-stream PDF embedded font (sfnt) at offset 0x9733 16476 bytes