Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf12cae8baddf13…

MALICIOUS

PDF

42.6 KB Created: 2020-08-04 18:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fee99f920e003d09dfff12f6f2c34e10 SHA-1: 3eaa94343b4d4138911d9e7c3ac6d1e79f64ba6c SHA-256: ebf12cae8baddf136e8b0eef06f5dfe4a65c41fc0280c5e5586f54f113c0b828
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. It also fires for PDF_SEO_LINK_FARM, suggesting a large number of outbound links, many hosted on Shopify. The document body, though partially corrupted, contains text related to 'research methods in psychology exam questions pdf' and the malicious redirector URL. This suggests a social engineering attempt to trick users into clicking the link, likely for phishing or malware distribution.

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=research+methods+in+psychology+exam+questions+pdf
    • http://files.thechironcenter.com/uploads/1/3/0/9/130969654/1ef979b2bd7e.pdf
    • http://didurujaw.7thbattalion13thartillery.com/uploads/1/3/0/9/130969472/4932661.pdf
    • http://files.petergallant.com/uploads/1/3/1/3/131384663/e5514b895.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/31201209593.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/49132404126.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/12906763552.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/bafesumow.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/sepejadamevurub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/11222627598.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/43245507070.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/tadelugegakokanelirafugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/software_quality_assurance_pressman.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_off0000676c.bin
4fa9a647432bc3c66a0abef814a2e333be253cef92fb43d49f7045665d5bbb9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 5872 bytes
font_01_sfnt_off00007b4e.bin
91f690db8fab3e9ba16f53b349c1e3534540a1069186467d6a895d5d9cbfa28d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4E 10076 bytes

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