Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd1c90b55239b63…

MALICIOUS

PDF

34.5 KB Created: 2020-08-12 15:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9058ae1d1ef393d9fbc21b3c7c04d540 SHA-1: acb5fa88d6a28e2ed19ccbcdec5736db94815c54 SHA-256: 2cd1c90b55239b63c1823634aad6e170aaa7a6e2e0bdf267004ac12ecbb58da1
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/wb?keyword=logiciel%20gratuit%20conversion%20pdf%20vers%20word', which is flagged as malicious. Additionally, it features a link farm of 13 PDF links hosted on Shopify, with one pointing to 'https://cdn.shopify.com/s/files/1/0431/6738/3712/files/37519125954.pdf'. The presence of a visual download button lure further supports a social engineering attack. The document body, though heavily obfuscated, contains the primary 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/wb?keyword=logiciel%20gratuit%20conversion%20pdf%20vers%20word
    • http://files.creeksidepto.com/uploads/1/3/1/3/131380292/bddd4a0a7731ad.pdf
    • http://files.esaetapi.org/uploads/1/3/1/4/131453109/wikovuxanujezo-nerufasinifazew-gaxiwaw-kajawevafuzax.pdf
    • http://files.v-list.org/uploads/1/3/2/8/132815220/4946318.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3712/files/37519125954.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/visaboxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/rososotijakipipaxotegorux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/historia_del_derecho_jorge_basadre.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/10206005592.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/apology_of_socrates.pdf
    • https://cdn.shopify.com/s/files/1/0435/3936/6047/files/2541805471.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2067/files/rerukifexafit.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/the_legend_of_zelda_ocarina_of_time_strategy_guide.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_off00004831.bin
5c9b29f262dd37fc1579628c95f6d346bc6407a1c4740f7eae20e5955b4c4c64
pdf-font-stream PDF embedded font (sfnt) at offset 0x4831 5416 bytes
font_01_sfnt_off00005ac3.bin
a0332767978bbe8b1fc9abc2a5bdfbeb41d7c0dd04be4bcc323d7af011db55e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC3 10064 bytes