Malicious PDF — malware analysis report

Static analysis result for SHA-256 509daf734eafc00e…

MALICIOUS

PDF

35.4 KB Created: 2020-08-03 16:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a964aa44cde9be6c1aaf64c80a66db32 SHA-1: d5cd9ccd69e9c3763d44c1cb06357baf26b31c34 SHA-256: 509daf734eafc00e016d24ea746aec3d0953966420ab61850f1a34fa1c41eac9
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free download for a surgical textbook. The link points to `https://ttraff.com/wb?keyword=manual%20of%20operative%20maxillofacial%20trauma%20surgery%20free%20download`, which is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, including one to `https://cdn.shopify.com/s/files/1/0429/9119/0167/files/computer_shop_bill_format.pdf`.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=manual%20of%20operative%20maxillofacial%20trauma%20surgery%20free%20download
    • http://files.ipersian.org/uploads/1/3/1/4/131453665/wizexoki_sagajuze_ramozopunu.pdf
    • http://files.rhworkplace.com/uploads/1/3/1/3/131384025/sepewi.pdf
    • http://files.demornewarrenddub.com/uploads/1/3/1/4/131409170/dakodup-simegi.pdf
    • http://files.musedupon.com/uploads/1/3/1/3/131383398/zovetat.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/computer_shop_bill_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/xowapeliwef.pdf
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/emco_storm_doors.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/86881429858.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/satufirupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/nero_star_smart.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/33714601273.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2935/files/riwixalumuvibekikijuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/14842745008.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/94003059299.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/58927908139.pdf
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/pepaxibilitiwopufivom.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/alfred_adler_theory.pdf
    • https://cdn.shopify.com/s/files/1/0438/1219/2413/files/54994341020.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_off00004aae.bin
5a3c1e2111324cf13a04f7582c4377c3406a9aaa04ba3afeb836117bc5af0da7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAE 5804 bytes
font_01_sfnt_off00005e89.bin
13e7cd6e6e61ccb93e0979c1c6e4785c0384fc35a7f6f525e69187189676a7eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E89 9888 bytes