Malicious PDF — malware analysis report

Static analysis result for SHA-256 943b594b67bf1976…

MALICIOUS

PDF

43.3 KB Created: 2020-08-31 02:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ce2e4cba93fc373638902b3563f8903 SHA-1: ff15528cc95bf21bde38bbc1d2699b3862242683 SHA-256: 943b594b67bf1976bab6ee6ebb99bf9f8b358a3529208921151a435cec238fcb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. The presence of numerous links to external PDF files, many hosted on Shopify, suggests a link farm designed to obscure the malicious destination.

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.com/wix?keyword=developing+4x5+film
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/96492768477.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/21870603568.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/32890850913.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5515/files/vuwububakatik.pdf
    • https://static.usrfiles.com/ugd/b88e3d_9c8230fd64664b178ea9a4e090fd449d.pdf
    • https://static.usrfiles.com/ugd/9219f8_5351a01f2540420797927d0798fc05ed.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/tudajolizadovoxudixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/24889961037.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/29494353246.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/penunufedetawivaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/2373787727.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/33864422532.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/74660560404.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/90648642623.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/dubem.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_off00006c65.bin
a8f3c1e56c006793a7e4ca4ccd8d14c9943a1180af414da708757887821cafcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C65 5076 bytes
font_01_sfnt_off00007dc3.bin
891a425994a40b0ea25b87f1a01bb73941b57dd91a3da3c4e5be0f2f2c7d7e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC3 10092 bytes

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