Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f80e8a26e12a59…

MALICIOUS

PDF

38.7 KB Created: 2020-08-09 08:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0a3062b62c1dac84b8cb34d182bf5e7 SHA-1: 983cdd69561fef7ed93a1cb560607a07fa5b0963 SHA-256: f1f80e8a26e12a59a19b328567b18dc527ba4aecae4616bcb7a63c8bb8423d09
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure for a 'career values assessment pdf'. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=career+values+assessment+pdf
    • http://files.caseybealdesigns.com/uploads/1/3/0/7/130775635/7584431.pdf
    • http://mikigude.toptechelectricalproducts.com/uploads/1/3/1/1/131163599/biwupumis-palivofamove-lasivifox.pdf
    • http://files.vipneurorehab.com/uploads/1/3/1/4/131483584/ritetejabebale.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/84239478197.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/bass_blank_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/92933294627.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/range_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65496272691.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/fapezajitexazolupef.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/lesamegokolizoxufalax.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/25668629805.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_off000059b4.bin
153df4a636caec46bc4925bc11215c1dba0d3d3542f2f028fbcaf9533369a58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B4 5152 bytes
font_01_sfnt_off00006b29.bin
0f5bf97870822959fdd3cbdfb077ccd28c9bc75b8a79a1dc4026bd4b1cd94a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B29 10340 bytes

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