Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadf34f365cbc6ed…

MALICIOUS

PDF

39.0 KB Created: 2020-08-01 23:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 765825a8c5f91132a95a625d85256f04 SHA-1: b98aa8efcd7a4cfffc5f00bfd65cf68d637d3066 SHA-256: cadf34f365cbc6ed4bb4f2319f18ab45cc80dc43685ba9e55a44f4402990858a
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are embedded within the document body and disguised as educational content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=elementary+differential+equations+6th+edition+pdf'. This suggests the document's primary purpose is to lure users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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.cc/pify?keyword=elementary+differential+equations+6th+edition+pdf
    • http://files.kpuhra.com/uploads/1/3/0/7/130775853/reretipowogatus.pdf
    • http://files.harrysinkpot.co.uk/uploads/1/3/1/3/131382497/rolaraxekewis.pdf
    • http://files.shopthornburyfromagerie.com/uploads/1/3/2/7/132740462/zaluzodipu_kokeseweduxugar_wogawisav_pitagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/pitamuwux.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/26003394807.pdf
    • https://cdn.shopify.com/s/files/1/0439/9818/3582/files/59848660425.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/nikufowoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/22886975220.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/79113881071.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/nusoxetegiwuzixax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98690712505.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/linufuga.pdf
    • https://cdn.shopify.com/s/files/1/0440/8115/2152/files/nutuxupeke.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/fuxisax.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_off00004c2e.bin
3d4ee98fee42d986866d4c3b31d7c6b7b1bcab24c5ea62122468063090146a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2E 5500 bytes
font_01_sfnt_off00005ebc.bin
d872861e11d07d165b1d86f77dcca57dde7239e24d83ce68702ec6e29199711b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBC 9936 bytes
font_02_sfnt_off0000808c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808C 4324 bytes

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