Malicious PDF — malware analysis report

Static analysis result for SHA-256 502a44c8da2f8128…

MALICIOUS

PDF

50.8 KB Created: 2020-07-31 00:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4163ec7db3b0b22451c54ff5693f6cac SHA-1: a4f59ae791f7776afedf34ac86e759fc8d5b4eb9 SHA-256: 502a44c8da2f8128ce9e1e532ff7060b30ce78d81b1b1f144437ec5ee5041ed0
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF SEO link farm pattern, with numerous links to external PDFs, many hosted on 'cdn.shopify.com'. The document body appears to be largely obfuscated or corrupted, but the presence of 'wkhtmltopdf' and a date suggests it was programmatically generated. The primary malicious activity observed is the redirection to a potentially harmful URL.

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=basin+and+range+mcphee+pdf
    • http://files.globalprayernyc.org/uploads/1/3/0/8/130813409/4767079.pdf
    • http://files.bestprimeproperties.com/uploads/1/3/1/1/131164358/jefiwedegisiron_velexo_wufamiruz.pdf
    • http://files.maladattaphd.com/uploads/1/3/1/3/131383247/7769813.pdf
    • https://cdn.shopify.com/s/files/1/0436/5628/2265/files/11534260798.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/38806307995.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/xipolojedegutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/vurujig.pdf
    • https://cdn.shopify.com/s/files/1/0435/9510/4424/files/zebiraroxinal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/93190961809.pdf
    • https://cdn.shopify.com/s/files/1/0431/3749/9302/files/32988505929.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/92805585099.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/winagirebofesegasug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/minafomabepuriwinawipixet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugifewelogukepebokiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/duzurewof.pdf
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/fafivobilolulaxapofofuwe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073f6.bin
f0dd00683707894e4a02256a59bfa6608b7fe39fad14e5510b90c233c3ade1f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 5184 bytes
font_01_sfnt_off0000855d.bin
2110251955be3be48498a946fd677c538f94dc6fc414a1ff61e240ca29f53c44
pdf-font-stream PDF embedded font (sfnt) at offset 0x855D 9992 bytes
font_02_sfnt_off0000a79e.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xA79E 16312 bytes