Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a243db77047c3be…

MALICIOUS

PDF

46.1 KB Created: 2020-09-03 08:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 612733d9770b43456b30847f5d3e3f10 SHA-1: b8b0e050d092940a8e2828837b50d0bb898603e0 SHA-256: 5a243db77047c3be18dab287625f347a1f41ca9ed557c6fd098c3d18a0d6db59
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify URLs, but one critical link to `ttraff.club` is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, indicating an attempt to drive traffic to potentially harmful content. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

Heuristics 3

  • 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.
  • 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=bathroom+interior+design+photos+free
    • https://static.usrfiles.com/ugd/374ce0_79f4000eb1ce4f689f5ce1c67074c18b.pdf
    • https://static.usrfiles.com/ugd/85c99c_2d52d4a1b5314487a37a983a7d28023b.pdf
    • https://static.usrfiles.com/ugd/733c1f_8a09706da9404cb8b9b279c988c8586c.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/21849951742.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/vavemokaritujodelupomum.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/ninojesox.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/94878479097.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/bsc_notes_for_free_in.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/co_state_abbreviation.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/csd_canteen_smart_card_application_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/91585630549.pdf
    • https://cdn.shopify.com/s/files/1/0439/1557/5464/files/1584209309.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4586/files/singular_and_plural_noun_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/3701094651.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/angular_formcontrol_disabled_function.pdf
    • https://cdn.shopify.com/s/files/1/0454/2916/2152/files/kensei_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/tratamiento_retinopatia_hipertensiva.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_off000075c0.bin
931bf80296b06b9688ce3a611c456215936b2c98258c72f89b90679ac12e4590
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C0 5472 bytes
font_01_sfnt_off00008831.bin
6294e6e8399562321ca96b7fca5ef923178f312180b2a8c1d3b246951145cbdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8831 10584 bytes