Malicious PDF — malware analysis report

Static analysis result for SHA-256 927e2be491f1ef6b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 01:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0f810af31a6ffbf30e8f370fa6d99c1 SHA-1: 42c03e4d0f25f198ee6015e2818517e98f5637fa SHA-256: 927e2be491f1ef6b399bb9cd243ffcb39be3b467003d0cf73eac71980b4f57cf
150 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, which points to a URL that appears to be part of a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains the same malicious URL and other URLs hosted on Shopify, suggesting a lure to download content. The primary malicious URL is https://ttraff.cc/pify?keyword=naming+alkyl+halides+worksheet+with+answers+pdf, which is likely intended to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=naming+alkyl+halides+worksheet+with+answers+pdf
    • http://files.wyonghighcareers.com/uploads/1/3/1/0/131070579/94bd3d5850ed24.pdf
    • http://files.fullfledgedgutters.com/uploads/1/3/1/4/131437376/lanabijikebogumati.pdf
    • http://files.equipoisemt.com/uploads/1/3/0/8/130814676/2017686.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/vimoxerujepaderajejimup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/lojutomufufupudesobif.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/10152377409.pdf
    • https://cdn.shopify.com/s/files/1/0429/3958/0575/files/pofezepokix.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/matomujubusalomofevuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/cantico_delle_creature_analisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/moluscos_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/bible_study_methods_rick_warren.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/92047383812.pdf
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/analogy_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/senupuresu.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_off00006099.bin
5dd45a2b50d85e15f86b6535fadf3c5f22c7f379d85013e1ef6747353cbc9156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 5680 bytes
font_01_sfnt_off000073ec.bin
4b33cbe6ca53236a2fb25fe8053e93ef174c2ce14f0c1a35429e36be6eb0243c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EC 12104 bytes

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