Malicious PDF — malware analysis report

Static analysis result for SHA-256 1453e5042f41260f…

MALICIOUS

PDF

48.2 KB Created: 2020-08-04 01:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f29ce2d153f8c157417935dc2c305f0a SHA-1: 2b0c8d244f2ba2a870f64df4f769d64891b5d0eb SHA-256: 1453e5042f41260fe0027b6512b9ea03c4d3099806aa02f7a6b4829618564371
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the primary malicious URL. This suggests the file is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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=cbse+nic+in+newsite+attach+ds1218+pdf
    • http://files.surveygoldsolutions.com/uploads/1/3/1/4/131483200/gebilu_ludasajojo.pdf
    • http://files.badgerbuildingmover.com/uploads/1/3/0/7/130739564/sukebatufulotexepi.pdf
    • http://files.kelljrlonghornsbasketball.com/uploads/1/3/2/6/132682134/ziratojufomizasixupa.pdf
    • http://lamatu.santamonicaquiltguild.org/uploads/1/3/2/8/132814930/65de7e678b.pdf
    • http://files.gullcottagecrafts.net/uploads/1/3/2/6/132682235/f44b85e64550.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/63571020857.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/xefijuwinirumeregibaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/convert_string_to_int_php.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/laxegokigasolapiwire.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/zevofevixetelezag.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/45691934865.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/gavafowiwadejuzoxam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/62612641698.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/vefuvavibowukapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/jaxesapaniripakut.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/vitufujofatafal.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/lipukufibategukazunop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f2f.bin
0f93496042e7511e7a7633ba2f64c314fc83f13215da2208d4bc8135ab5e6840		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 5628 bytes
font_01_sfnt_off0000726e.bin
0ac512a13203e11f2076c106a646e2aa4f68c815eecb3b10935d98838501c28c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726E 10476 bytes
font_02_sfnt_off0000967c.bin
362c34dea588734723e36d8e93480efe907bb3855f59a7c94536ce17dbbc8e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x967C 9028 bytes

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