Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee887b90f015827…

MALICIOUS

PDF

46.1 KB Created: 2020-08-05 18:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25dc58de206c38edbf7b7fe60ce3f30d SHA-1: 6cf2e72dfb5ff9e70d70e1490673f71d6363abcb SHA-256: 5ee887b90f015827cf40f27cbb79b828bbed0498f7596433d79c201b9df58979
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains URLs that are likely part of a link farm or phishing campaign. The ML classifier strongly indicates malicious intent, and the presence of a malicious redirector suggests the document is designed to lead users to harmful sites.

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=huduma+number+bill+2020+pdf
    • http://files.moonflowerwellnessavl.com/uploads/1/3/0/8/130814169/latekanesojo.pdf
    • http://files.indigoowlboutique.com/uploads/1/3/1/4/131407705/vumupaxok_powaturaxoko_leduwikovod.pdf
    • http://files.greengoderich.com/uploads/1/3/0/7/130776327/3620169.pdf
    • http://files.historyisthehook.com/uploads/1/3/1/8/131871814/8300817.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/gikasedijuson.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/gabasewibinumegixekub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/zejinevegivivojakipuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/xasasepobutaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/fixenasak.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/venumazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/24177116726.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/masofoxerinorujeleza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/64452372311.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/4756549705.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/monuvuwevuravi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/78013583243.pdf
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/edema_cerebral_tratamiento.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_off00007686.bin
06fcd90e3b13f76efa0c6bb9a0306790edd75950de1f84c55ad69bcc444108ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7686 5384 bytes
font_01_sfnt_off000088b1.bin
ce042189228bc316fbc461cf5fd58c09aa3b7ca04ea05f7f51af788be222a2bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B1 10140 bytes

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