Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a8de865fdaef66…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 17:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43bdb67a294ef70f7aca2c4b74df44e3 SHA-1: d0f2c91d89acfb88af4f4b9557962d06453de5d4 SHA-256: 50a8de865fdaef66b44669d90e1665a1698bf989020bdfb04547a0c115216e39
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 point to a redirector service. The primary malicious link identified is https://ttraff.com/pify?keyword=english+speaking+lessons+for+adults+pdf, which likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be a lure for educational content.

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=english+speaking+lessons+for+adults+pdf
    • http://files.trudietrewin.com/uploads/1/3/0/7/130775730/xurof.pdf
    • http://files.aliciavilas.com/uploads/1/3/0/9/130969545/0960633a.pdf
    • http://jeludava.michaelblooman.co.uk/uploads/1/3/1/4/131407406/giwini_tisevor_fojada_belugewu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/37546487025.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/18434056207.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/kojukunuxupebe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/tuvufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/ultimo_edital_da_prf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/71179216562.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/11455825402.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/blastomyces_dermatitidis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/baixar_creator_gratis_em_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/mapugurire.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2507/files/50946885296.pdf
    • https://cdn.shopify.com/s/files/1/0438/3001/8210/files/microeconomics_perloff.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/6827894407.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_off0000701e.bin
22aa248eeba7a13d54b79622a227c4d5cd733033ea3773dd2094bf6412051ed9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701E 5324 bytes
font_01_sfnt_off00008232.bin
800b2206fbc6936f29d82499cadec50dd5239b0864e64f691f815615271d00bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8232 10120 bytes

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