Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5dcefd2d5682e24…

MALICIOUS

PDF

37.8 KB Created: 2020-09-11 05:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b1dc49e383b6e80a0fd3ceb54ae1d2f SHA-1: 6a1e3d463fd7ba27253a267c7bbbc056ac04d7c9 SHA-256: b5dcefd2d5682e243de544b04e2702afa2fab03dae609c4193724941db35859c
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. This suggests a phishing attempt where users are tricked into clicking the link, leading them to a malicious site. The presence of multiple PDF links points to a link farm strategy to obscure the final malicious destination.

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.club/wix?keyword=buku+tentang+agama+islam+pdf
    • http://files.ccydnehobbies.com/uploads/1/3/1/3/131382092/muxukonil.pdf
    • http://files.free2code-initiative.eu/uploads/1/3/0/7/130776562/3902795.pdf
    • http://files.libbymourant.com/uploads/1/3/2/6/132683154/sadubibeleref.pdf
    • http://files.nextav.online/uploads/1/3/1/4/131406149/5287878.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/40946474923.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/sources_of_carotenoids.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/kagepasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/tenofobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2453/1101/files/frankenstein_penguin_readers_level_3.pdf
    • https://static.usrfiles.com/ugd/5926b4_3515c1e8a110423b947399820946d88d.pdf
    • https://static.usrfiles.com/ugd/e3c460_03711582a37845a2a0a63a06ee8eb62b.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/dragon_of_dojima.pdf
    • https://cdn.shopify.com/s/files/1/0430/5390/8117/files/inspector_report_of_loading_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/latest_american_war_film_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/8921/5129/files/bra_size_fitting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/90180553499.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_off0000556f.bin
4c0df90f10286f1e2dc7a75f4b7eb6076285a66adfe272e2343a0fde91ce6217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x556F 5376 bytes
font_01_sfnt_off000067bc.bin
fe4d5e83f54816f2c093cf05a120a52c3c41873735d2c77136225c528e0e2b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 10256 bytes

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