Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f327bf986eed6b3…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 15:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e0a830e6e219c8cbd76e0ced3561796 SHA-1: f4b9c10bea3662877a32ef74f691f17df566d5fb SHA-256: 9f327bf986eed6b340e2b9f8b5bda670a163fea9c93a2fea576796d0c60898c2
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=beginners+guide+to+python+book+pdf`. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is likely used to redirect the user to a further malicious destination. No scripts were extracted from this sample.

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=beginners+guide+to+python+book+pdf
    • http://files.encircledbirth.com/uploads/1/3/2/7/132740435/2629563.pdf
    • http://files.ballaratplacentas.com/uploads/1/3/0/8/130873996/9a2cc3699bf1.pdf
    • http://files.kaindl-us.com/uploads/1/3/1/4/131438245/df4dd33ce5f22c.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/90771802393.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/bits_and_bytes_ace_academy_cse.pdf
    • https://cdn.shopify.com/s/files/1/0434/2739/7797/files/91660652894.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/nadubaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/wavomepub.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/femoliv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/how_to_disable_ansel.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/55339660085.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/24559984246.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_off0000626c.bin
84dc6792d2f521c49b5815a1b4a45457abee21efc462405cf5932d5ffde69301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 5416 bytes
font_01_sfnt_off000074dc.bin
1140fa799df2e0a4a6e4996eb8ad52d4de2cf037b2d78face607085af31ca567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DC 10076 bytes

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