Malicious PDF — malware analysis report

Static analysis result for SHA-256 1268541e50420db7…

MALICIOUS

PDF

47.8 KB Created: 2020-08-07 00:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f5102d077a4a196f973ab5400b3f27 SHA-1: e9f26d636ef9b4af0eb4efed27ce6c4ccb9dbfa3 SHA-256: 1268541e50420db73c98afa2fa6799295735a5e183a7af9ca86e4fe15331a7e7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a redirector associated with malicious infrastructure, disguised as a free Acrobat PDF reader download. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to direct users to external, potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=acrobat+pdf+reader+9.+0+free+download
    • http://files.cutthecord.us/uploads/1/3/2/8/132814241/moxawutofowawid_tumorifum_wegajifirezivij.pdf
    • http://files.msbrodysclass.org/uploads/1/3/1/4/131406930/3935276.pdf
    • http://files.nickjagger.org/uploads/1/3/1/4/131407029/2414756b.pdf
    • http://files.mdrewery.co.uk/uploads/1/3/1/6/131606373/6737296.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/98746171180.pdf
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/91254510683.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/mtga_codes_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/76458923175.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/export_from_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/palos.pdf
    • https://cdn.shopify.com/s/files/1/0437/4301/9159/files/html_code_for_web_page_design.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/causas_del_fracaso_escolar_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/criminal_justice_system_process.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1809/files/korean_grammar_in_use_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/99943784598.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_off00006d1c.bin
7d4a65deac8f1dac057631ca8c8a2387ca6a7df2ad190e9916ddfc1ccba4fb71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1C 5260 bytes
font_01_sfnt_off00007f18.bin
69b2fac23e59a94124f5a976301d2792a6769c5fb9b466d412f43bd0492a6202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F18 10828 bytes
font_02_sfnt_off0000a3fc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FC 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.