Malicious PDF — malware analysis report

Static analysis result for SHA-256 feff409ca46d31fd…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 22:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80bf098a1f1b3e9b20c0a326b9f68235 SHA-1: 126650ed47e4e75673bfd4af7b6082e2b39f0036 SHA-256: feff409ca46d31fd2ab3955ed8040e9e99cd2245803036005fee50c9d3bc204b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Performance appraisal phrase book' and the malicious URL, suggesting a lure to trick users into clicking the link. The primary attack pattern involves redirecting the user to malicious infrastructure via a link disguised as a document resource.

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/wix?keyword=performance+appraisal+phrase+book
    • https://cdn.shopify.com/s/files/1/0430/9460/5975/files/63133177090.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/vulonavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1714/0386/files/visual_boy_advance_roms.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/cds_exam_syllabus_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2000/1178/files/camstudio_9._1._0.pdf
    • https://cdn.shopify.com/s/files/1/0464/5152/3752/files/zerepebipivukijevumoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/skewness_and_kurtosis_examples.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4ef5ad615cc40d399cde0dc95359476.pdf
    • https://static.usrfiles.com/ugd/b8c837_2526511def294fe18bce66adcfdb3219.pdf
    • https://static.usrfiles.com/ugd/04e6f9_e0366d5faad740c8bb045e3f8f919702.pdf
    • https://static.usrfiles.com/ugd/b8c837_c84bc509c82e4486b3a31c1d0b4ac0c6.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/
    • https://static.usrfiles.com/ugd/b8c837_c84bc509c82e448

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000738c.bin
6b8b681d948bc38f26d34c3076fa0616871601718521f204dcbfadee118482d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738C 5460 bytes
font_01_sfnt_off000085e3.bin
bb280cbcefed9717fddc53fd1083af1fb1964af35db3f6affd8b13e6e3e5ac2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E3 10392 bytes

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