Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f1545801caaaf4…

MALICIOUS

PDF

37.1 KB Created: 2020-08-15 03:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0270d37d326195c128c1559cd42a7fe8 SHA-1: 1539a919e93ecfbe2da7938cccb7de5fac040cee SHA-256: 41f1545801caaaf4c3f78f79b30f2f742eb9145bddbce65f7b49905f678a963c
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.cc', which is flagged as malicious. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be social engineering through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=upholstered+button+tufted+platform+bed+frame
    • http://files.rebeccameehan.org/uploads/1/3/1/4/131438471/moresivagunemo_totizujaninero_kitamukexevum.pdf
    • http://files.genevauu.org/uploads/1/3/1/4/131452735/89bee7a6c741.pdf
    • http://zalon.wunetserve.com/uploads/1/3/1/3/131381428/61794d.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/fugejubosiwexiluraso.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/50800846180.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/ayushman_bharat_application_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/kokiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/pediatric_anesthesia_reference_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/tebemapidifizupidarafup.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/54978311025.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/dotakasirilofulivagov.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/63077999310.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/58528492195.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/ayushman_bharat_online_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/simegajetabipekopevudu.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_off000050cc.bin
3bb9d9e11a1c845686117c5796a5ae1455909a6aabef11c92d67acae093a41f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50CC 5412 bytes
font_01_sfnt_off000062fd.bin
b0b1068bf85819c724a98cbc917b2b1f086116f7de36781f4a18ec87acd2e1bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 10616 bytes

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