Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2ebc06f06e76ce…

MALICIOUS

PDF

45.8 KB Created: 2020-08-10 02:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8009923e6eb2531ea7474d1070ed7584 SHA-1: d7a54c71fee345ad5382915dc4d3564ce50b64c7 SHA-256: 5c2ebc06f06e76ce0885008d5a82b4cf0f439b4e5ccf11bfc4304cfdf3797137
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.ru/pify?keyword=amiina+al+mufti+book+pdf+free+download', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.ru/pify?keyword=amiina+al+mufti+book+pdf+free+download
    • http://migunobu.floridasnowicecream.com/uploads/1/3/2/6/132681824/zinuzo_wagilomikoxip_vegomefaximesi_wizevewowuzo.pdf
    • http://ligibobax.courtwatchma.org/uploads/1/3/1/6/131637814/penowodoxadibo.pdf
    • http://mogoza.zodiacciphers.com/uploads/1/3/0/8/130814017/a4b4062dd8f.pdf
    • http://files.richherbalgardens.com/uploads/1/3/1/4/131409526/mobinajop.pdf
    • http://files.carlya2zmusic.com/uploads/1/3/1/4/131437311/raxubesawutobefaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1374/1472/files/755541310.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/dojewonesovumoxivi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/alphabetical_order_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/uninstall_mcafee_endpoint_protection_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/babeturinivorobimazuzaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/10945518252.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/41805329508.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8275/files/diwokikojorofomobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/9940172071.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/36770957967.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/gafizodujixaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4741/files/rujeved.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008dbf.bin
f703f50246d6e11f5707ca60772b482d8f5b3024fc282575ac941f4c87e66cd8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8DBF 17932 bytes
font_00_sfnt_off00005852.bin
f5ad9d0b467ad5ebbeed8e435395d6b76becb73a48a6b66eebf53ea966ddf21c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5852 5296 bytes
font_01_sfnt_off00006a4b.bin
d30463214f43dedfce3d7d4908ca6d550a275a35dc69715ce65b7976d814e2d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4B 10300 bytes

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