Malicious PDF — malware analysis report

Static analysis result for SHA-256 4215cd290baf3a4c…

MALICIOUS

PDF

47.8 KB Created: 2020-08-08 00:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ee111a99afbeb9b4aa9bf464e337b6c SHA-1: dcbe18bc743ffadf1301772f1b592309de55f3b5 SHA-256: 4215cd290baf3a4c86d3f8ff1ff3db06bdab48799d7fa36f4cf9ed8d36b01af0
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'SE_DOWNLOAD_BUTTON' heuristics. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'coordinate geometry formulas'. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=coordinate+geometry+formulas+for+jee+mains+pdf
    • http://xixiwujaj.adanacfloor.com/uploads/1/3/0/8/130814297/a1e4fc9ed03.pdf
    • http://goduzapiw.michaelfoyle.org/uploads/1/3/1/6/131606490/75110bc219.pdf
    • http://files.crookedrowflowerfarm.com/uploads/1/3/2/7/132710491/bafimetoluvajebiru.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/baderonelaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/18493821762.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/guludelozoxepenovezur.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/44811095863.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/jasazakiloparig.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/lobatoxagatafelexelino.pdf
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/tapodomile.pdf
    • https://cdn.shopify.com/s/files/1/0438/0390/2112/files/pokemon_platinum_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/54448116615.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/67796109981.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/escape_from_tarkov._12_release_date.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_off00006580.bin
597f863d8de7b36d1ebe0ac7645e7c058c986e429ef02e9312b994cdf69f3f5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 5444 bytes
font_01_sfnt_off00007805.bin
90b052fe0518b80eca4e03dcde488ddad54dd20c9bd4d0d4a8be1bfc6133f8cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 14040 bytes
font_02_sfnt_off0000a3d7.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D7 4324 bytes