Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62c15b3abed8e8a…

MALICIOUS

PDF

46.4 KB Created: 2020-08-08 17:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3dd5a2542dae0f358d36a64efc4beb0 SHA-1: 994eff10aff2b441331f8835b725fc0c5d507365 SHA-256: c62c15b3abed8e8a6c670b0d3985b10cd25218db0d8dfe9d82959ff82bf645a7
128 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and references to PDF generation libraries, suggesting a lure to disguise the malicious intent. The presence of a visual download button further supports a social engineering attack. No scripts were extracted from this sample.

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.cc/wb?keyword=jspdf%20html%20to%20pdf%20angular%206
    • http://files.thealmostexmoor.co.uk/uploads/1/3/1/6/131637190/samivovo_natexarut_xadesolapim.pdf
    • http://venun.ozgurince.co/uploads/1/3/0/9/130969754/dijanon.pdf
    • http://files.thehenrysplantfarmonline.com/uploads/1/3/0/7/130739951/tivajavari.pdf
    • http://files.holyspiritchurchde.org/uploads/1/3/1/3/131378852/pekelige-jajirarurer-posuwusi-bojazirazipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/tonujukijuzofivi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/94195624387.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/wii_games_wads.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/architect_handbook_of_professional_practice.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/tixalilawogusosili.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/dakowugakovodata.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/ocarina_of_time_nintendo_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/77967707850.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/51200265946.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/megofanikexakimimuwu.pdf
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/accp_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/3834/9211/files/side_by_side_plus.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_off0000688d.bin
bc1d12a1defe3e3fac027617dc30f665b4e21fa3f77a2d920cd7b7bc0ecfa941
pdf-font-stream PDF embedded font (sfnt) at offset 0x688D 5596 bytes
font_01_sfnt_off00007b6e.bin
c7071a8d8acc2565b2d5af70314546a75fdf2f7834533e11a720bf9e6779d477
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6E 15696 bytes