Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf9eaafa37f4fce…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 11:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71cbb4dbc07bb341bda03a27091e9e99 SHA-1: 7abb9ab4d55abcbef656e4839b8e7176f1ba93ab SHA-256: caf9eaafa37f4fced4d733eca00149f8b9e655e4708d29fee367341c6e51d9fa
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a PDF download and the malicious URL itself. The primary attack pattern involves luring users to a malicious site via a seemingly legitimate link within the PDF.

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.ru/pify?keyword=physical+chemistry+by+peter+atkins+pdf+download
    • http://files.kktr.co/uploads/1/3/1/3/131381112/budipegidog.pdf
    • http://files.stayinalivelongbeach.org/uploads/1/3/2/3/132303238/lukudawukulet.pdf
    • http://files.heartpieces.net/uploads/1/3/1/3/131379749/3776242.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/91281440812.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/alphabetical_reasoning_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/kubipag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/78723833397.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/87681718401.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/rolling_stone_top_500_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/gevixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40545468116.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/22603826607.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/47405209949.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/rscit_admission_form_2020.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_off00006989.bin
9de8ca9a2c90650f0bafbf66da037a23fb3ea6ce15a82ce942b88b01b4af86de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6989 5796 bytes
font_01_sfnt_off00007d2f.bin
8cd751d3812ec1fa5a6ecd16d4a66c5ce6962730fd8fd021be592506a5d683e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2F 10236 bytes

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