Malicious PDF — malware analysis report

Static analysis result for SHA-256 423337dab18640a8…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 04:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69735b93eff180ccf8dc72c948d95b95 SHA-1: 769f68e490f37f0a835531418714c56ba8b83eb6 SHA-256: 423337dab18640a8f7597e56b4c6d32cfec0c9c9553bf1cfb790543dc6d26417
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 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Toefl ibt sample reading test pdf' and the malicious URL, suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to obscure malicious redirects.

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=toefl+ibt+sample+reading+test+pdf
    • http://jabowal.gillespiecoalmuseum.org/uploads/1/3/1/6/131636725/b7d394b1c0996e.pdf
    • http://files.zara-ahmad.com/uploads/1/3/1/8/131858540/6652614.pdf
    • http://files.myfiorella.com/uploads/1/3/1/6/131637311/2586649.pdf
    • http://files.thediscouragedfeminist.com/uploads/1/3/1/3/131398428/80511444b.pdf
    • https://cdn.shopify.com/s/files/1/0435/6967/6451/files/57909510340.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/xukej.pdf
    • https://cdn.shopify.com/s/files/1/0433/9453/1493/files/beruroto.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/70657991911.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0799/files/vaxozelet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5325/9679/files/40524033535.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/voxufofovuxibutivogitivov.pdf
    • https://cdn.shopify.com/s/files/1/0437/5586/4213/files/xusewek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/79451305561.pdf
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/calculus_10th_edition_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2306/4488/files/44297677399.pdf
    • https://cdn.shopify.com/s/files/1/0431/8596/3169/files/nadanoxokesekut.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_off00006967.bin
c631cee7c3a5213b8251a0ee6f5815c96718fa2dc60ec5f87b4bc249856661ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6967 5452 bytes
font_01_sfnt_off00007bcd.bin
2ed3784888778c50e0acd4ffbb38222b8df02bb6024ba147cbe38ddec99886bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCD 10176 bytes

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