Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d4cfe7e24089b1…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 04:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 457a3b1277af88b759635fb7c3f955b8 SHA-1: 0939c6abe125588d813f4ceeb4b7a6ced6dd3a23 SHA-256: 85d4cfe7e24089b189dd8839b47e4647f5a3b43be75882496e1f6492a2ea18e7
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, with the primary one being a redirector. The embedded URLs confirm the presence of both a malicious redirector and a large number of links to PDFs hosted on Shopify. The document body contains garbled text and the primary malicious URL, suggesting a lure to external content.

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/wix?keyword=developmental+ecological+systems+the
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/924473034.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/xajirovop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/fulabilekatinome.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/iata_international_airport_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/31565856300.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/tevopujomukijuvugibosif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0433/2234/3577/files/yayati_kadambari_marathi_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/681839971.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/69106931107.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/kejuforifuwiwokeda.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/68775164989.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd518353262340a5935270e5658c08b8.pdf
    • https://static.usrfiles.com/ugd/48d9a1_84bc98f4547a4b00bd5b7c49ffbf8e29.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_0165045e91e64d67a54ef5576da3b4bb.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_off00006302.bin
ca9cfabbaf6828640778323ae10e074f712de425a588c0691b3a878b1818aad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 5412 bytes
font_01_sfnt_off00007554.bin
2adf570550b8e61ccbe5afe197c35fc6233ee00817067ef0f7f535721bf216b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7554 9940 bytes

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