Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e0044c88008e29…

MALICIOUS

PDF

49.2 KB Created: 2020-08-23 15:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d4d84e24558bdd75b3e2ca4e334e82f SHA-1: 18a0df31377b73f442f7bc53e6f95631c536e482 SHA-256: 11e0044c88008e2955c4d6b2326591dfe7e30999b5fb1c7bc923884d467bba8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to redirect 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.cc/pify?keyword=mandated+reporter+training+act+126
    • http://files.kbgamesllc.com/uploads/1/3/2/7/132740584/zekunizavixejofum.pdf
    • http://juzedog.canberraveterinarycrisisfund.com/uploads/1/3/1/1/131164250/3661822.pdf
    • http://files.coachingandcounsellingottawa.com/uploads/1/3/2/6/132682171/a7c809e31ec35b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/zevokowekabajadorura.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/1999_ford_f150_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3490/0642/files/vozoximejibuveturabufokid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3463/files/cursive_handwriting_reference_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/rijefonosuwulevedewas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/66030713764.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/48794243735.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/12620192390.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/28169390746.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/10496583515.pdf
    • https://cdn.shopify.com/s/files/1/0457/9187/1132/files/januf.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/52848809869.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b5f.bin
a3860310c585b2211dfbac6cab8258f7f90ff2d22ec7ef3a4489b86e7e06598f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5F 5372 bytes
font_01_sfnt_off00007dbd.bin
795c0845ce56ee1501de0b47d18bb658b6d25968a5e083a6ac615ef58a5ad932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBD 10672 bytes
font_02_sfnt_off0000a264.bin
0646a63a478fe53468b8dbbe05b608d617a04836cde27f490c8d0ce00ae8a9f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA264 16164 bytes

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