Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f577ee1b517254…

MALICIOUS

PDF

39.8 KB Created: 2020-08-16 14:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3efa8dfdd033099d7ff35402369924a8 SHA-1: 824e903b238c85c2ad7decd5db91d2af263ea6ff SHA-256: e3f577ee1b517254531914cd1921fc9ec6b264ca2ff118c2ec0792e4cbd982ae
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document converter. The document body and heuristics indicate a lure to click on this link, which leads to known malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the final malicious destination.

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.cc/pify?keyword=online+scanned+pdf+to+word+document+converter
    • http://files.cyclecharity.com/uploads/1/3/1/1/131163667/1921273.pdf
    • http://files.mithalurim.co.uk/uploads/1/3/2/3/132303329/3149064.pdf
    • http://files.bethcaindesigns.com/uploads/1/3/1/4/131408913/ff962b708de5.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/punafaga.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/15638105795.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7957/files/tagapinujataguronevox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/jikikewarutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7397/8011/files/pivajojibilapufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/core_java_programming_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/corsair_void_pro_rgb_wireless.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/niwizijoxegatob.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_off00005d54.bin
284abf5aec20099853ccd9b6c44b82693c1fdce34b9ae63cabf5c10954d521d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D54 5480 bytes
font_01_sfnt_off00006ff7.bin
78c9334685df16ab2bee48c0989e9e583153e75616bfc251a84fc43e34f32001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF7 10140 bytes

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