Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba8e5ecf308cd6d…

MALICIOUS

PDF

44.9 KB Created: 2020-08-27 14:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6095173c1f90cbfdf1b310f803040d81 SHA-1: 1385fa6619665ff41cde92d728e62afa1b95c145 SHA-256: 8ba8e5ecf308cd6dbf23eb2e1c4c71d6c8fe41a66dd4c038daf8cfe6395a490e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and numerous extracted URLs confirm this is a link farm, with the primary redirector being https://ttraff.com/pify?keyword=printable+lined+writing+paper+college+ruled. This suggests the PDF's purpose is to lure users to a compromised or malicious site, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis to the redirection behavior.

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=printable+lined+writing+paper+college+ruled
    • http://files.remodelcostspreadsheet.com/uploads/1/3/1/4/131408245/jumupuvolona.pdf
    • http://pesepi.bittersweetapothecary.com/uploads/1/3/1/1/131164250/wejunixolakobuw-nokolenaba.pdf
    • http://files.utahenglishcreamgoldenretrievers.com/uploads/1/3/0/8/130874639/jojazigenopap.pdf
    • http://dozunajek.kira-marie-mccullough.com/uploads/1/3/1/4/131453558/kilabo.pdf
    • http://files.avtarindiatours.com/uploads/1/3/0/8/130814225/49c2d.pdf
    • https://cdn.shopify.com/s/files/1/0431/7868/8674/files/lopogulolerisokojesorip.pdf
    • https://cdn.shopify.com/s/files/1/0462/7041/4999/files/busybox_non_root_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/old_time_radio_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/feden.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/54227605269.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/meredifefemujuvuxoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/guzamebiteb.pdf
    • https://cdn.shopify.com/s/files/1/0439/0184/5659/files/empty_html_page.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/zakirupixenewudene.pdf
    • https://cdn.shopify.com/s/files/1/0437/1477/3147/files/56472906907.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/sufogitoxonusadedug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1878/files/36700151785.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/34618809757.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_off00007094.bin
26b2b8f7ce29e683537f8afbab336bcb038a47cf63071edbe39940a72bebe2b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 5296 bytes
font_01_sfnt_off000082a7.bin
6c4f5e281d26eb4b2ea60790a8498869cda5f7efba651c28ebae3ea624726192
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A7 10364 bytes