Malicious PDF — malware analysis report

Static analysis result for SHA-256 82acb21fa1d51a7b…

MALICIOUS

PDF

35.7 KB Created: 2020-08-31 06:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f574cb3249d12bab1f91d517d309c67 SHA-1: ecf7dc45795dad17d9da1e3ea60526bd3072e7af SHA-256: 82acb21fa1d51a7b6b625263d75d5113bed8da25a9fcc7afb06615ffd32905f4
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text that appears to be a movie title, likely used as a lure. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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=taboo+filmi+t%2525C3%2525BCrk%2525C3%2525A7e+dublaj
    • https://static.usrfiles.com/ugd/a107db_0073578dc6ba41189ae6cce158cc1194.pdf
    • https://static.usrfiles.com/ugd/7c30af_d8897f7713774804b8d0aec919679ceb.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_5407e21435b140a68527a7c0d9b3c7d6.pdf
    • https://static.usrfiles.com/ugd/eb4c03_e007114900d84a5ca35a64ca8f9a0709.pdf
    • https://static.usrfiles.com/ugd/b8c837_b50ae81c0c974ae18ca70c8758801094.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/69251931615.pdf
    • https://cdn.shopify.com/s/files/1/0433/6068/2139/files/jajaboperogorowejorat.pdf
    • https://cdn.shopify.com/s/files/1/0434/4689/4758/files/indications_for_mechanical_ventilation_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0463/2441/6674/files/circus_charlie_game.pdf
    • https://static.usrfiles.com/ugd/6350c7_6e043632111b413286c10837e5cbabfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5cfaea357d74801a4863968279feb0a.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_cf5b2e652b6e437aafbc245b85e2b428.pdf
    • https://static.usrfiles.com/ugd/cafc24_89ce293858484bc7b1f86d9487b4613c.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/giwozofabegiwes.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/hbr_guide_to_better_business_writing.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/69058145893.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/edit_blackout_text.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_off00004d08.bin
2579e81d9cae68a61a905b667af52315e5c278dab3ff9b8a91b5e4631cb527f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D08 5404 bytes
font_01_sfnt_off00005f1f.bin
d0f2753136e2d918ab8e1ae16ae320955197b700da22c6ee64e7cae633dd1e00
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1F 9660 bytes