Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d2ff0e95e2f098…

MALICIOUS

PDF

41.6 KB Created: 2020-07-31 17:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8d7ceff300a3f4669273098008bfe35 SHA-1: 21eed99d9ea5da1f3fc5b3fff677860b3003eab4 SHA-256: 18d2ff0e95e2f09801eceba1934cd87dd3af51903106c07fa5b1ceb93e698478
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains text suggesting a lure related to 'the magicians book pdf', which aligns with the malicious redirector's keyword. The presence of embedded URLs and the overall structure suggest an attempt to direct users to malicious content, likely for phishing or malware delivery.

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.com/pify?keyword=the+magicians+book+pdf
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdf
    • http://files.apexlss.com/uploads/1/3/1/4/131453989/vasufujen-ximubugosel-gilasirevabilov.pdf
    • http://files.christianbuildingmaterials.com/uploads/1/3/1/3/131378932/wobatozuzab.pdf
    • http://files.mychickenman.com/uploads/1/3/2/8/132814147/varipugav_xadinetodarov_fosotawakefado.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/zukiroguparojisafuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/87138016980.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/93220040366.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/kalixesaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/convert_byte_array_to_string.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/36499929332.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/55569807484.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/tupigogidifileguruw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/45083924395.pdf
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/mavevaxupofekutit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/gavur.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_off00006455.bin
df27b4ee59bc0d56a5b3f080b2e44f4ac83991a3733acc497659cf1b994fef0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6455 5592 bytes
font_01_sfnt_off00007737.bin
169359a4ba38e8781012c76052e853d745825b13d4c75402b9725dd424d94d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7737 10044 bytes

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