Malicious PDF — malware analysis report

Static analysis result for SHA-256 479b01a8dedbcc2b…

MALICIOUS

PDF

86.4 KB Created: 2020-07-31 02:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90d0bf44bc343bf1043b1dd1e819230a SHA-1: 314babcb32f6ac7742bef49da0a22c6d3280b62f SHA-256: 479b01a8dedbcc2b16eaa374d938ceff9669a1968eaf006a32c5606d649b4118
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Cervantes don quixote pdf'. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary IOC is the redirector URL used to funnel victims to a malicious site.

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.cc/pify?keyword=cervantes+don+quixote+pdf
    • http://files.playtherapyworks.com/uploads/1/3/1/4/131414743/pofukabexi.pdf
    • http://files.betterbowlsbako.com/uploads/1/3/1/0/131071253/9396945.pdf
    • http://files.asmuyaocommunityschool.com/uploads/1/3/2/7/132740743/324409.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/20186633458.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/21607339680.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/27655675563.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/77573454276.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/rewamifadusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/8872540184.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/68973839187.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/ruxawenijixejudakoduvo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/70856198674.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/26575931087.pdf
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/65588017085.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_off0001129b.bin
79ecfcaf65a713880eadc8e477d9f00ed2336690bd4be99f9214132f50a912bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 5164 bytes
font_01_sfnt_off0001243d.bin
c6278d386b8437550bd52161a7899227cabb6a3c9fab38a288c9b8061de7805b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1243D 11968 bytes

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