Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5eefa3ca5b8286c…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 09:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b2cd2f97fd2103ffed4e0e340600bbf SHA-1: 6de50cbedc36a2863fb284e78508e79f2f4097bb SHA-256: d5eefa3ca5b8286ce4ae651bc77c9549da71ac5d519eecadeae0f6e7ca745345
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=stardew+valley+floors'. Additionally, it exhibits a PDF link farm, with numerous links hosted on cdn.shopify.com, including 'https://cdn.shopify.com/s/files/1/0436/4333/8912/files/tikezedemebabilivuralusa.pdf'. The presence of a visual download button lure further supports the malicious intent of directing users to external, potentially harmful, content.

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=stardew+valley+floors
    • https://cdn.shopify.com/s/files/1/0436/4333/8912/files/tikezedemebabilivuralusa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/axis_and_allies_1941_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7914/files/b-_27_target.pdf
    • https://cdn.shopify.com/s/files/1/0433/1762/4987/files/bugikisadopuvesudekigesek.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/credit_risk_analyst_resume_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/52056123737.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/vuxexes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/adobe_acrobat_word_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/fifof.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/54551140591.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/limijofirimukakasereja.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bc711463b5543f9bfda39dff8fea57d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cbf90df8ae845fba507f72abba8354c.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_7476274692174a649703a8f5ac2f0940.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_off00006055.bin
ac9d63b8410141f030eaa2dab5872477a4f252e223c435da78b23a4627dab50f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 5256 bytes
font_01_sfnt_off00007262.bin
c4ce2cf9dbfeb547b377c3735d7ad25c752c71c1c627c02cbcc2564a47352cc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7262 10260 bytes