Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ffb5311cf32c4c…

MALICIOUS

PDF

50.6 KB Created: 2020-08-12 10:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40b07f5106a0fd63d1acef1e7b84273 SHA-1: 5bfb64c11bc3f85bf045bf206ee3dbc0dcc8d8de SHA-256: c9ffb5311cf32c4c7b03028928ab03892292b9157624b90ab9d9b3e44ef8865f
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, directing users to 'https://ttraff.ru/wb?keyword=download%20novel%20challenger%20deep%20pdf'. Additionally, it features a PDF link farm with multiple Shopify URLs, one of which is 'https://cdn.shopify.com/s/files/1/0431/7275/7668/files/fusik.pdf'. The presence of a visual download button lure further supports the malicious intent of redirecting users to potentially harmful content.

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=download%20novel%20challenger%20deep%20pdf
    • http://files.dkgalphaalpha.org/uploads/1/3/2/6/132696558/8595452.pdf
    • http://funaxu.cmiltonwrightmusic.com/uploads/1/3/1/3/131384401/7432755.pdf
    • http://fopena.amaartisanjewellery.co.uk/uploads/1/3/1/4/131453555/wezanadixanosax.pdf
    • http://vitus.drivelearning.org/uploads/1/3/0/9/130969103/tobuvuvorifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/fusik.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/92412941537.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/timufifarata.pdf
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/11714325366.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/blood_relation_questions_for_ibps_po.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/89806060988.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/astm_impact_test_standard.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/55027898344.pdf
    • https://cdn.shopify.com/s/files/1/0450/7457/9608/files/architectural_drawing_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/goreruromilorijij.pdf
    • http://tinyurl.com/govtq67
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072f5.bin
b9a139b638f46fa08e584fbcff60129f6a79fc4837418219e94d34158da7007d
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F5 5388 bytes
font_01_sfnt_off00008560.bin
5a5aff1b5baf5edbdda9038549a01ddab52a6a86603f1a32e653e50d11c3f620
pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 9976 bytes
font_02_sfnt_off0000a7b0.bin
fbeccb1482ee56052ed809ec6cb7dfbc577d51b9212e43fffabc93e29761b6bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B0 16248 bytes