Malicious PDF — malware analysis report

Static analysis result for SHA-256 863af9cd57ff3a00…

MALICIOUS

PDF

42.2 KB Created: 2020-09-16 00:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03318e01aa702f02032916616facb704 SHA-1: e1262ade407607e6911ceeffc34a0a720a75c356 SHA-256: 863af9cd57ff3a009423c5fb298692792464ee1f58e17f3fb84d9d52c81bf839
136 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a link to a known malicious redirector and a link farm of SEO-poisoned PDF files. The document body, though partially corrupted, contains text related to 'collin county jail inmate funds' and includes the malicious redirector URL, suggesting a lure to potentially malicious content. The presence of numerous external PDF links points to a strategy of distributing malicious content through a link farm.

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wb?keyword=collin%20county%20jail%20inmate%20funds
    • http://visakorek.carolinasiscebs.com/uploads/1/3/2/7/132711973/rafijir.pdf
    • http://kodivuw.cherylanncooke.com/uploads/1/3/2/8/132814969/7328749.pdf
    • http://bitikipap.asbestosmasters.com/uploads/1/3/2/7/132712115/dizufotilawagawon.pdf
    • http://difobed.4lifecapital.com/uploads/1/3/2/7/132710507/2af1fd5c.pdf
    • http://romupixo.conciergepainrelief.com/uploads/1/3/1/4/131406515/zomojunurumivo-rigonoliniwar-vinalumog-nesuzevopodirug.pdf
    • https://static.usrfiles.com/ugd/b48b60_4ff70740acbf4492a079bce6bc597ad5.pdf
    • https://static.usrfiles.com/ugd/6290de_a58554fe82124a0ca68d1d4ad4a3271e.pdf
    • https://static.usrfiles.com/ugd/948cea_2004f0ac36aa4b0eb1bf8e80f93187a4.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/alto_sax_music_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0463/1239/0821/files/betternet_vpn_free_for_windows_8._1.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7613/files/national_action_plan_2014.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ad.bin
4a74d21d0848f04fd31eb7a3365438d5b70d9a1228580fc62068b984a157c4f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x58AD 5156 bytes
font_01_sfnt_off00006a38.bin
1f499ef5afc63dd121ed95919b60bf127576b2af080234ad79d3fd862ea23d9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 10476 bytes
font_02_sfnt_off00008e12.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E12 4324 bytes