Malicious PDF — malware analysis report

Static analysis result for SHA-256 e790ce77c88f93a0…

MALICIOUS

PDF

37.5 KB Created: 2020-08-11 19:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4305395a52724d9c7faffac19d8ebeaa SHA-1: 39730e5f506b31cbbf8549d0dbd7823dc82e74bd SHA-256: e790ce77c88f93a05e5340ebd22dc0a597c1ed340dba37142051cb315624a88b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.com/pify?keyword=goodword+english+arabic+dictionary+pdf. This suggests a social engineering attack aiming to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains references to a dictionary and the wkhtmltopdf tool, reinforcing the lure. The presence of many links to Shopify domains, while individually benign, contributes to a link farm tactic. No scripts were extracted from this sample.

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=goodword+english+arabic+dictionary+pdf
    • http://files.letsgetlegalnz.com/uploads/1/3/0/7/130775866/b4ebe2e268.pdf
    • http://files.arkansaspastelsociety.com/uploads/1/3/1/4/131411474/4272817.pdf
    • http://files.spiritfireshaman.com/uploads/1/3/2/7/132741382/lotizakisubanas-xutov-tijonopimubepal.pdf
    • http://files.ladyteeth.com/uploads/1/3/1/4/131406811/labewexudejosiwuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/senizinidakuxivopoviwig.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/xowukevedumuparitadubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/tamutenarupapirotur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/numulogufisupif.pdf
    • https://cdn.shopify.com/s/files/1/0431/5938/8320/files/nikuxegepefumofodegabotog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/minecraft_wirkds_fikder.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/35668889611.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5451/files/88038688312.pdf
    • https://cdn.shopify.com/s/files/1/0432/4265/1816/files/nefaladus.pdf
    • https://cdn.shopify.com/s/files/1/0436/4868/0089/files/brownian_motion_physics.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/2969701490.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/zaxazageb.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/stock_market_basics_in_telugu.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_off000053af.bin
268f8e4734757adf11256ab31b9d66f8d8aa298812a9a229440826db23ff4d63
pdf-font-stream PDF embedded font (sfnt) at offset 0x53AF 5780 bytes
font_01_sfnt_off00006772.bin
6b2d82f9e4c8a46057b4fd704783b50b640464c514415df9773502ae7bf85252
pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 9812 bytes