Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac87a6ef0499669…

MALICIOUS

PDF

44.4 KB Created: 2020-08-09 01:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f5f92963c3b0ea6bd5c5f58e805b78c SHA-1: 90cd06279d637f642e90f1b5bdf639818851c9dc SHA-256: fac87a6ef0499669be00ba9873233d5dc65f0c91d2cba7c2200fefab49e7b23f
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector found by the heuristic. This suggests the document is designed to lead the user to malicious sites, likely for further exploitation or credential harvesting.

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=kindle+file+format+convert+pdf
    • http://muzeneri.birthservicesbykristin.com/uploads/1/3/1/4/131406082/jokarakexiwev.pdf
    • http://files.prometheanstudio1.com/uploads/1/3/1/1/131163538/wibewidiwijubiwuzusa.pdf
    • http://bapitujam.gielitesoftball.com/uploads/1/3/2/7/132740978/5201731.pdf
    • http://files.moreways2makemoney.com/uploads/1/3/2/6/132683330/01c4962.pdf
    • http://files.auburntile.com/uploads/1/3/0/8/130814601/dd774625cf104.pdf
    • https://cdn.shopify.com/s/files/1/0429/2807/9004/files/xokomewumek.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/gabavijidetenot.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/python_get_json_from_url.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/batitomikosipit.pdf
    • https://cdn.shopify.com/s/files/1/0435/5457/0399/files/cantilever_beam_deflection.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/vojegezifelakupeviguda.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/equivalent_fractions_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4178/files/vesokafid.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/47965585014.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/wegef.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/23625889222.pdf
    • https://cdn.shopify.com/s/files/1/0446/7671/0563/files/chemistry_notes_for_class_9_urdu_medium.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_off00006f05.bin
aa4e9f60b7304a14430c8dfc120b65ea817bf5c72b9a05d612763e2c1580cd43
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F05 5152 bytes
font_01_sfnt_off00008081.bin
aa199e3bc4c1c41c1f1a65da051d3a3fdc69e1dec846b93d797d42bd1305c06e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8081 10476 bytes