Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f59231641bafb9…

MALICIOUS

PDF

50.7 KB Created: 2020-07-29 13:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 623cbe0e0a0b09bbdb842ac6a46624bb SHA-1: 41e5d4e6a845c0bbd4d251f4eb13eadaf509a6b7 SHA-256: 02f59231641bafb90e893f33a8bd151700167688d9d21b9aa325a680f38a91b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or are part of a link farm designed to manipulate search engine results. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=anticonceptivos+orales+lactancia+pdf', which is flagged as a malicious redirector. The document body is heavily obfuscated and appears to be a lure related to 'Anticonceptivos orales lactancia pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=anticonceptivos+orales+lactancia+pdf
    • http://files.kallers-studio.com/uploads/1/3/1/4/131437834/7c73c1be.pdf
    • http://files.sunraysranch.com/uploads/1/3/1/4/131408204/6809439.pdf
    • http://files.christophersorrentino.com/uploads/1/3/0/7/130740112/riweretaresad-parajovitozuwu.pdf
    • http://files.breadfromheavenbypam.org/uploads/1/3/0/7/130776861/tovovodawa-lebakijededov-kerajefunusibep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/denetosuvil.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/86750333652.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/zemuvip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/vezunapobaperotawegege.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/wafabupu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdf
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/wisewibogerewirovazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/44299053754.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/zafomesudopukuwilipabogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7236/4437/files/zimumulegogifodolevene.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/4640349210.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008402.bin
c815d44643adcd4379cad675666463a7b94b8b5e831fede3a372f76b8e1faf2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8402 4984 bytes
font_01_sfnt_off000094f5.bin
84b67e273f8950a7a505f42ec1d3cc92acd57430f1d60fadfc9845adb7f59c0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F5 12692 bytes

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