Malicious PDF — malware analysis report

Static analysis result for SHA-256 57813d12c4e639b3…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 18:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a2399e7e5d19dc7e7ef3a03a4117d12 SHA-1: bf70f2a859c898edf80e351d37ad2bd7713cd736 SHA-256: 57813d12c4e639b318d0d1c47e7e719ce75ba06ef44364eba643c925eef4a8a9
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, ttraff.com. This domain is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the text 'Present progressive questions and answers' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or to obscure the final destination.

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/pify?keyword=present+progressive+questions+and+answers
    • http://files.ajitourservices.com/uploads/1/3/1/8/131856380/6510508.pdf
    • http://files.mackbrosgroundskeeping.org/uploads/1/3/2/6/132682790/b5dad515f4b2ab3.pdf
    • http://files.yojimbocorp.com/uploads/1/3/0/8/130874493/8a7691c9.pdf
    • https://cdn.shopify.com/s/files/1/0434/1982/8386/files/vavujijugupelavofibun.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/mijasuvofode.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/57408642204.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5526/files/misebanijumarumota.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/maryland_tax_form_502.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/ginuxob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdf
    • https://cdn.shopify.com/s/files/1/0434/4912/2983/files/45905295359.pdf
    • https://cdn.shopify.com/s/files/1/0430/1173/5705/files/malosifetuwunakate.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/zaxude.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_off00005adb.bin
5d3858cb8cc317c566547017baddb1441941fd005ce77f43864c8ed59ac473db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADB 5372 bytes
font_01_sfnt_off00006d3c.bin
7378abf406692c15ef7daa472deb6b528de8a58abd4342e0b3f9f7ff0cbb5cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 10288 bytes

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