Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ec01e94a53155f…

MALICIOUS

PDF

39.9 KB Created: 2020-08-07 21:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0121e7aa8ab9753b79358a60b7b38bfd SHA-1: 3c4c4f70b95ea4ab7ba115c44ccd76c666785596 SHA-256: 87ec01e94a53155f7ea4562a21762cb769d7281455bfea7369e558d3157ba321
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to external resources, many hosted on Shopify. The presence of a 'download button' lure further supports a malicious intent. The document body contains text related to embedding PDFs in Excel, likely a pretext to encourage interaction with the malicious links.

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/wb?keyword=can%20you%20imbed%20a%20pdf%20into%20excel
    • http://files.crossharmony.com/uploads/1/3/0/7/130739651/katigetatitano.pdf
    • http://files.thevoicesproject.org/uploads/1/3/1/4/131407818/fidabibeno-rutifudunogajuk-xiromom-dexotaponet.pdf
    • http://files.dfwroofingcompany.net/uploads/1/3/1/8/131856398/78381ec2b4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0433/8876/4316/files/subway_fax_order_forms.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/sipupu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/onkyo_firmware_update.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5135/files/kamowalonalisedasif.pdf
    • https://cdn.shopify.com/s/files/1/0432/2089/3851/files/introduction_of_diabetes_mellitus_type_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0435/2848/7072/files/17024835860.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6585/files/investment_banks_in_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0450/3034/2806/files/adenite_bacteriana_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/28106322065.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/gebawuragunefisun.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_off00005f77.bin
7962d1a7fae9acaa115e73ca6df941fea3a12a42b8c66be4bb4c426eebcba537
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 5240 bytes
font_01_sfnt_off00007149.bin
4b8cfdfebeb8c3f997c5eba82fe19d8fa751aea714914c384e91c4e5af88400c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 9812 bytes