Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7de88531a1bab81…

MALICIOUS

PDF

80.1 KB Created: 2020-09-13 23:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86288ce1d18450ead4b638d4e0bc7e36 SHA-1: fceea016e2aff116da464b0cd1d8d5e438a4b622 SHA-256: b7de88531a1bab81fe7ca692a488584581492a67e09bf3d5148d1ff886d9e75f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link and a large number of external links, suggesting a link farm or phishing attempt. The presence of a 'download button' lure further supports this. The document body, though heavily obfuscated, contains the malicious URL, indicating the primary intent is to redirect the user to this malicious site.

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/wix?keyword=gilson+chain+drive+rototiller
    • https://cdn.shopify.com/s/files/1/0436/8062/8889/files/christmas_festival_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/xibimi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/991437196.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/88326767940.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/jaxefosa.pdf
    • https://static.usrfiles.com/ugd/54fa57_5fe975e4a73245d89f9135998b710af0.pdf
    • https://static.usrfiles.com/ugd/ede58b_ad7d8938e4a14df3af598932581788f0.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/surevopavalasenuxisevizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/niwazesuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5178/5109/files/dusigep.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/vanelokawepe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8817/4497/files/newspaper_template_for_google_slides.pdf
    • https://static.usrfiles.com/ugd/8e1900_d99e1222033c4fe482748f9c78aa8398.pdf
    • https://static.usrfiles.com/ugd/45e30f_f0801294d4304ccbb058baddc8d66aa3.pdf
    • https://static.usrfiles.com/ugd/1be480_236e9ba42bd04ab280c30106f5ff6acb.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_d22413fcdb5d43aa91df705be86fc758.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_off0000f282.bin
5b14caf41063a9b565af89e34637a5ddf54c1dc89251b38f2efdc6eddbe5c2f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF282 5120 bytes
font_01_sfnt_off000103ee.bin
a7b1c15a348d8b9885b9a28a396a53327379812f8f220efe0fb76f67d5ff6d2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x103EE 15380 bytes