Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc05492cab4857e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-04 21:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79e71c0782e3c8fd4c49eebc6f5c4365 SHA-1: bda026d4e00ab952cd7b7ba4a98e77fddf0dc6a1 SHA-256: dfc05492cab4857eae329976299e1ed2fbc7676d3588094aa91f532aaf22c998
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or traffic redirection. The primary malicious link, https://ttraff.cc/pify?keyword=property+and+casualty+insurance+study+guide+pdf+texas, is identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to insurance study guides, likely serving as a lure.

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=property+and+casualty+insurance+study+guide+pdf+texas
    • http://files.muralfx.com/uploads/1/3/1/4/131454523/5484706.pdf
    • http://files.dashingdoodlesnc.com/uploads/1/3/0/8/130813887/619295.pdf
    • http://files.christianmendozamusic.com/uploads/1/3/0/7/130776266/wonexovoxu_tevunoloxazuju_gimolizo.pdf
    • http://files.gorenje.ph/uploads/1/3/1/0/131071297/suxetazar.pdf
    • http://files.secondstoryhoney.com/uploads/1/3/0/7/130776077/takidelidobe_nesilogare_lokotajebidumex.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/gawininosidim.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/28057271010.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/nuwerotav.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/12402328654.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/national_movement_of_amhara_manifesto.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/jesuvob.pdf
    • https://cdn.shopify.com/s/files/1/0428/2089/4886/files/sobinizesuzo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3432/8735/files/physical_chemistry_experiments.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1400/files/48229727880.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/forever_in_my_mind_only_you.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4933/files/67065715507.pdf
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/fotisokupiver.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_off00006b25.bin
bb22b46980b17a6a4a2207eb3d15383ce5ab0d1e9bf3e2a6670bd405a5af4fac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 5492 bytes
font_01_sfnt_off00007df8.bin
24e39287542fa8fe767d7dca71ba960fe991ef8ea42dcd2a3cc9e940de4f56fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF8 10504 bytes