Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd5e0d95667ddba…

MALICIOUS

PDF

47.0 KB Created: 2020-07-30 03:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51f790cd4008f458a05d7510a1886370 SHA-1: ad908f4df33e3034c1dd442eb7ea0f980d561d5e SHA-256: dbd5e0d95667ddbad12da81e47b2a8221892814fe4b1ee37c44b6eacc181aa2c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on 'cdn.shopify.com'. The presence of a visual download button lure further supports a malicious intent to trick the user into clicking the link. The document body is heavily obfuscated and unreadable, but the heuristics clearly indicate a redirection attempt to a malicious URL.

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.com/pify?keyword=cen+01+2020+pdf
    • http://files.bensonstreetstudio.com/uploads/1/3/2/8/132815767/87dc3df64a5d4.pdf
    • http://files.p2tp-vaiscope.net/uploads/1/3/0/7/130775828/gemamamig.pdf
    • http://files.jcountyacademy.org/uploads/1/3/1/8/131856162/3522d7f461a9f7d.pdf
    • http://files.kaelynnsartstudio.com/uploads/1/3/2/6/132681144/f69672e.pdf
    • http://files.smyrnafoundation.com/uploads/1/3/0/9/130969837/megukudo.pdf
    • http://files.p2tp-vaisc
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/44115954738.pdf
    • https://cdn.shopify.com/s/files/1/0432/8741/2900/files/ruzivevebit.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/xakidodugegowirunatapepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2089/4886/files/mugifomefeju.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/97933134310.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/fonitafuvobow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/domimorujixegoxole.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/7892845004.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/43208835778.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/39796739642.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/33802236490.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/godoviverixafenulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/799639459.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_off000072e8.bin
4218e98d0495d15c260da9f9155afab520237d0253c5cce2741c6e3eabe6e373
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E8 4416 bytes
font_01_sfnt_off000081f6.bin
f9e387ec570861ebd599dfd78e31e5d428d3f95e607e32995523b775051e6ca1
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F6 14272 bytes