Malicious PDF — malware analysis report

Static analysis result for SHA-256 9996075d0d7a6aa6…

MALICIOUS

PDF

41.0 KB Created: 2020-08-03 05:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45d2f4fddbce7178ec3456f8d369da23 SHA-1: 7bcb49b0fc30a6ce291c50cd8f86e688a29f04be SHA-256: 9996075d0d7a6aa665947603947f46e5f9c5a02dab508e3226c6741e2fb81eff
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=a+manual+for+living+epictetus+pdf'. This URL is designed to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains hosting other PDFs. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'epictetus pdf', suggesting a lure to download a document. 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.cc/pify?keyword=a+manual+for+living+epictetus+pdf
    • http://files.noshushingallowed.com/uploads/1/3/1/4/131437516/tujufumubegelar_fixeki_rorofula.pdf
    • http://files.gapinteriorismo.com/uploads/1/3/1/6/131636677/lokolufo.pdf
    • http://files.travelingnurses1.com/uploads/1/3/1/3/131378771/5969702.pdf
    • http://files.murphysubsea.com/uploads/1/3/1/4/131453215/gotagojisibawev_fizuxazador_navedapiribuwo.pdf
    • http://files.carplakesfrance.co.uk/uploads/1/3/1/3/131379266/7445767.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/taxawadinelim.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/29587197651.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6733015585.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudusojixidotivage.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/3191562202.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/88993499357.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/92416560333.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/25342817148.pdf
    • https://cdn.shopify.com/s/files/1/0432/2410/5124/files/76918038421.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/boxulojimilunosipotejiba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/latin_bass_book_gratis.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_off00006133.bin
d4312566ab6dea180d681af2ab27f3faf441e94e69e94e44b5184977cd05c2d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 5524 bytes
font_01_sfnt_off000073eb.bin
58a5a9d21c0c1fedeafaed01fc104759e66b81e688c4074207fe9003b16419a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x73EB 10348 bytes