Malicious PDF — malware analysis report

Static analysis result for SHA-256 f581fff64d80dfc4…

MALICIOUS

PDF

63.7 KB Created: 2020-08-08 03:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff9d28d82691455ee54940c2ab88cfca SHA-1: 52afe3d53e8cbf1eefade4eee5e10776944e9b27 SHA-256: f581fff64d80dfc42eef99ad787d7bf47a8ce0d41626d70ec90cf4206c3434d6
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=konsep+biaya+dan+sistem+akuntansi+biaya+pdf', is designed to redirect users. Another heuristic identified a link farm structure, with 'https://cdn.shopify.com/s/files/1/0434/3644/1767/files/sukal.pdf' being the first URL in this farm. The document body is heavily obfuscated but contains references to the redirector 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.com/pify?keyword=konsep+biaya+dan+sistem+akuntansi+biaya+pdf
    • http://files.vsportsapparel.com/uploads/1/3/0/7/130776509/vovorekepiboxex-jogamunovikoxa-mesamariger.pdf
    • http://majulexej.michelbeauvaisart.com/uploads/1/3/0/8/130814297/xitoteso.pdf
    • http://files.everafterprincesspartyevents.com/uploads/1/3/1/4/131437722/kubano.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/sukal.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/nimifixunezejasuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/3365/5446/files/badminton_score_sheet_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/mudininitixaremejeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/32714167569.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/fonuvamigonuguvulibinufe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/jawubos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/declutter_your_home_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/62931500887.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_off0000add5.bin
7e75ced95942aedf63c3d0aaa1262f55c8d9bb5920a8bd248b2798171cec04cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADD5 2036 bytes
font_01_sfnt_off0000b77c.bin
5418f2a5fbbb67e06f87c98fb0297e3afd0fbafab3e725ee2d57337dabb56c69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB77C 5332 bytes
font_02_sfnt_off0000c998.bin
5e2a9eb7efe85d4708c7b2ed57faf04afb119c5e119fdc56d226a24b33689598		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC998 12092 bytes

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