Malicious PDF — malware analysis report

Static analysis result for SHA-256 c126a5378d4912a7…

MALICIOUS

PDF

38.2 KB Created: 2020-09-17 08:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16c1391b8691717d337b8b82ad0b7d4e SHA-1: 1f36d74644ea475e1f20d675bba2331d0db0013b SHA-256: c126a5378d4912a771fc379d81559d33dfc9280ccdea5527c21a8c0a75378eb6
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Prelude in c minor sheet music' and includes a call-to-action phrase. This indicates a social engineering attack aiming to trick the user into visiting a malicious URL, likely for further payload delivery or phishing.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=prelude+in+c+minor+sheet+music
    • http://files.hcs-conference.com/uploads/1/3/1/4/131408203/zesuxatudurofuk-nuvudu.pdf
    • http://files.mccarthyphotography.ie/uploads/1/3/2/8/132815003/7660144.pdf
    • http://files.stambroseparish.com/uploads/1/3/1/3/131379980/wapodoparawakas-ruvuvonefutimo-dolal.pdf
    • http://files.sparklecleaning.net/uploads/1/3/1/8/131857540/fuxumizige.pdf
    • https://80527f1c-ff18-4bbd-8454-2e221d4f3c40.filesusr.com/ugd/a31856_876b8509f38b4cf5a6b5ebe341aecccc.pdf?index=true
    • https://4b967737-7187-4107-9ec3-26a379e2adba.filesusr.com/ugd/b41a9a_12b66d47340043c3a36557d04e593968.pdf?index=true
    • https://4c152fb9-60f6-46a2-a320-2489ee975c4b.filesusr.com/ugd/99b222_4fb8cf0a785343149310fa94fd6d78f0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/zalit.pdf
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/lightweight_architecture_decision_records_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/b._a_pass_full_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0486/0156/3301/files/eastern_woodlands_shelter.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/71747560573.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/41620294890.pdf
    • https://cdn.shopify.com/s/files/1/0443/0423/6700/files/download_idm_terbaru_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2472/files/64571034204.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_off00004a73.bin
f347b050907f1c0713136871e803343c490e84518ee4b330eb11d45b72ebf6fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A73 4852 bytes
font_01_sfnt_off00005ab2.bin
bcfb02be9136bb8eb26f7c2428d1479104a2bf2510ad1a0f03ac97f626454b09
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB2 10284 bytes
font_02_sfnt_off00007df8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF8 4324 bytes