Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6bd9e7dd1d9368…

MALICIOUS

PDF

43.4 KB Created: 2020-08-14 03:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98335b721e0434756291d1a6c3b7fa6b SHA-1: 45339fc66a62e95cae6c5540bc42135395c0589e SHA-256: fc6bd9e7dd1d9368413bc6485baf073d46922395f72d1ea86d4bb3d7922c252b
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify-hosted PDFs. However, one critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=grass+brush+photoshop+cc+free'. The document body also contains this URL and a call-to-action phrase, suggesting the intent is to lure the user to click the malicious link, likely for further exploitation or phishing.

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=grass+brush+photoshop+cc+free
    • http://files.laneycobb.com/uploads/1/3/1/4/131453902/2925299.pdf
    • http://files.gabriellacascio.com/uploads/1/3/1/3/131398509/nameduvixi.pdf
    • http://mamose.azabpublishers.com/uploads/1/3/1/6/131637113/midesupasipaw.pdf
    • http://files.johnphilliposborne.com/uploads/1/3/0/8/130874647/dutor.pdf
    • http://files.suearchibaldart.com/uploads/1/3/0/7/130776439/7871196.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/sujezofemiwepex.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/zetesobokojoropenejunid.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/pogejukokozuloxezavuxef.pdf
    • https://cdn.shopify.com/s/files/1/0432/1610/9736/files/74495333003.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/45647955276.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/gamawojeguxavomu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/chill_lounge_music_blogspot.pdf
    • https://cdn.shopify.com/s/files/1/0432/2141/8147/files/12076637618.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/somelezexogupenoderepezi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/99724681737.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/definicion_de_aptitud_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/32548005065.pdf
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/62759521575.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_off00006332.bin
35c0c20cc26af0ff66e34c54689f9612c6c918934cd7b14ae7f7d0660ac077ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6332 5244 bytes
font_01_sfnt_off000074ff.bin
3c4be0d5967009588dc8bc4a9d4102fb8117762fc9f845073f98578a4ac20570
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FF 13952 bytes