Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1f533ab423cc5f…

MALICIOUS

PDF

49.8 KB Created: 2020-09-14 02:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0106fc55ed9c08d4dd931c88fb5da56a SHA-1: 686f1d4b5ae46132ec5a6c0bccfa854159d6e8fb SHA-256: bd1f533ab423cc5fec792beaaf6e12691d4a8994ab961d644d864327ce65a079
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to a gambling-related keyword. Additionally, it exhibits a PDF link farm, suggesting a tactic to distribute malicious links. The presence of a 'download button' lure further supports a deceptive intent. The document body, though heavily obfuscated, contains the same redirector URL and other PDF links, reinforcing the malicious nature of the file.

Heuristics 4

  • 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.
  • 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.club/wix?keyword=judi+poker+terpercaya+di+indonesia
    • http://files.lovedbyminifarm.com/uploads/1/3/1/1/131164555/4daef01f8e19.pdf
    • http://vukasefap.super-sounds.com/uploads/1/3/0/9/130969280/4124705.pdf
    • http://files.hempnu.com/uploads/1/3/2/7/132710690/xupawulunorored.pdf
    • http://files.swolfephotography.com/uploads/1/3/1/4/131409794/lojojefipabajo-nigasofixaw-lapujedolubox.pdf
    • http://xizami.rscareersupport.org/uploads/1/3/1/4/131452836/gipupaledaniwa.pdf
    • http://jitaju.knottydogcreations.com/uploads/1/3/1/3/131379021/1169846.pdf
    • http://files.sapphirestudio.co/uploads/1/3/1/4/131437535/6944951.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94430640368.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/tc_application_for_school_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0464/8629/0584/files/lidunemelagokavone.pdf
    • https://cdn.shopify.com/s/files/1/0433/4105/4105/files/inequalities_involving_absolute_value_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/ardhanareeswara_stotram_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0436/1748/4957/files/fafujupigugogafob.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a1.bin
6bf1b4d2a14b30d7adff450f0b3fa5bb950d85233b97107420a949542f38d5c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 3164 bytes
font_01_sfnt_off000073e4.bin
945ffd4a2ccb57cdf24ff0b55e9e61f0bb7eed260270a29b8fb7ab18f14369ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E4 5192 bytes
font_02_sfnt_off0000859c.bin
0ef03ee2d0d6c0c11be38ae5009db860ffec858dccfa3f112fccaca36fd8510b
pdf-font-stream PDF embedded font (sfnt) at offset 0x859C 5940 bytes
font_03_sfnt_off000094de.bin
eb40aa7f1881fb79f1951423bf6a7a855fa04cfba6a13f726e56c1f5322104c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x94DE 10952 bytes